I have a screenname and my real name. This seems to be a pattern with most artists... although some shorten to initials.
MMOArt is using their company name. That's another possibility.
"City of Heroes. April 27, 2004 - August 31, 2012. Obliterated not with a weapon of mass destruction, not by an all-powerful supervillain... but by a cold-hearted and cowardly corporate suck-up."
Yeah you can use both man!
Try Dark-Jedi?
I think you can try variations like on these forums too and when ya do make sure to add me and let me know you're on lol. I know I wanna be watching you.
But yeah you could use D. Shuler or Shulerthedarkjedi.
Just some ideas
"City of Heroes. April 27, 2004 - August 31, 2012. Obliterated not with a weapon of mass destruction, not by an all-powerful supervillain... but by a cold-hearted and cowardly corporate suck-up."
I use the unofficial company name I've created. 
I use a screen name and then a nickname. I don't think anyone thinks I'm "Luke Cage Hero for Hire".... but I thought it was cool.
I use a screen name. Just the old school bbser in me. I've seen some use both.
And I know the feeling. When I first started online back in 1990, I was Omen.
Do you have any idea how many Omens there are now? Sheesh. I still have friends who call me Omen or "Omie."
"If I fail, they write me off as another statistic. If I succeed, they pay me a million bucks to fly out to Hollywood and fart." --- George A. Romero
"If I had any dignity, that would have been humiliating" --- Adam Savage
Virtue Server: Kheprera, Malefic Elf, Lady Omen, Night Rune, La Muerte Roja, Scarab Lafayette, Serena Ravensong, Kyrse, and Arachnavoodoo among others.
Luckily, my handle wasn't taken.
I use CelticBolt, I think most people just make a handle up, as most of use CoX types have forum names I think we try to stick with them, I think TA has a good thought for using your name. Shame Darkjedi has gone.
CB 
I go by an old online nickname I've had for ages, personally.
Some people use nicknames, screen names, spameric names (what I call names like xxxdarkangelxxx, Neko1289341138, etc), and some others do indeed use their real names. It's such a huge community, it's not like anyone's going to beat you with oranges based on the name you pick.
"Take the Yuan-Ti, bash them with a club made of frozen stupidity, then rip out their sense of subtlety with a rusty spoon, and then you have the Snakes of Mercy Isle" -Taltha Widowfang, drow stalker
Now playing at an MA near you: Dragonslayers #335375
I tend to fall back on the tried and trusted McBradders of days long gone
Hmmmm I think maybe XxDarkjedixX has a ring to it :P
How about -=DarkJedi=-
Or Lord Dark Jedi
"If I fail, they write me off as another statistic. If I succeed, they pay me a million bucks to fly out to Hollywood and fart." --- George A. Romero
"If I had any dignity, that would have been humiliating" --- Adam Savage
Virtue Server: Kheprera, Malefic Elf, Lady Omen, Night Rune, La Muerte Roja, Scarab Lafayette, Serena Ravensong, Kyrse, and Arachnavoodoo among others.
[ QUOTE ]
How about -=DarkJedi=-
Or Lord Dark Jedi
[/ QUOTE ]
There ya go!
"If I fail, they write me off as another statistic. If I succeed, they pay me a million bucks to fly out to Hollywood and fart." --- George A. Romero
"If I had any dignity, that would have been humiliating" --- Adam Savage
Virtue Server: Kheprera, Malefic Elf, Lady Omen, Night Rune, La Muerte Roja, Scarab Lafayette, Serena Ravensong, Kyrse, and Arachnavoodoo among others.
I had to use Dark-Ether cause someone had jumped on my name already. You might try something like that - add a hyphen or underscore or whatever.
My Deviant Art page link-link
CoH/V Fan Videos
I feel your paint, DJ. Some numb-nut signed up on DA with Graver back on '02 and hasn't logged in since then 
I just ended up tagging a 13 on the end.
Now, have you tried ---------------------------------DarkJedi-------------------------------? It's long, it's eye catching, and I think it might have a tremendous annoyance factor if you wanna cash in on it 
Well, adding a hyphen will cause a difficulty in searching for you.
Umm...I, myself, use my real name. I know of a few others who does as well...umm...like:
Terrell Bobbett of Marvel Comics uses bobbett for his.
Mike Bear, who's doing the G.I.Joe comics uses Bear65 for his.
Brandon McKinney (from here) also uses his name, too.
Hmm...okay, maybe that's the only ones that I can name right off the top of my head. I know there are definitely others, too.
But anyways, whatever works for you, really. If you went with Dark-Jedi (with the hyphen), it may cause alot of your watchers to goto DarkJedi's page instead and be all confuzzled and [censored]? about why Shuler has some thing about hacking the planet. (referring to http://darkjedi.deviantart.com )
I use my real name, plus my stock art account has my company name. (that's lethe-gray and dtfstock respectively)
Please read my FEAR/Portal/HalfLife Fan Fiction!
Repurposed
Apparently the other, false DarkJedi has one piece in his/her /its gallery, and they haven't been on since 2001.
DarkJediShuler?
Darth Shuler? I like this one.
"If I fail, they write me off as another statistic. If I succeed, they pay me a million bucks to fly out to Hollywood and fart." --- George A. Romero
"If I had any dignity, that would have been humiliating" --- Adam Savage
Virtue Server: Kheprera, Malefic Elf, Lady Omen, Night Rune, La Muerte Roja, Scarab Lafayette, Serena Ravensong, Kyrse, and Arachnavoodoo among others.
VeryDarkJedi?
DarkChocolateJedi?
TheDarkJedi?
MisterJediDarkinson?
[ QUOTE ]
TheDarkJedi
[/ QUOTE ]
I like this one but it still would get confused
It might be easier just to make a clean break :-/
gah, I dont know...
since you CANT get the nickname you want.... id say go with your real name (or some easy variation), its better that people know its YOU than anything else.
Personally, I think you should use your real name.
You can call yourself Francine for all I care, just let your art speak for itself, man!
"Take the Yuan-Ti, bash them with a club made of frozen stupidity, then rip out their sense of subtlety with a rusty spoon, and then you have the Snakes of Mercy Isle" -Taltha Widowfang, drow stalker
Now playing at an MA near you: Dragonslayers #335375
Mmmm. Yes. I use a handle, but I've also put my real name on my page, which it gives you the option to do.
"Emmychidna" is my nickname. I sorta wish I used my real name to make it more universal. Too late to change it now though.
I tried to make a DA account, and of course someone else took "Darkjedi". Grr!
My question is, do people use their real names on DA? I haven't spent much time there and I thought I'd ask the COH veterans for your advice.
Bums me out too... because I've been "Darkjedi" for 20 years...