any input would be easier if you provide some output of the purpose:solo PVP,team PVP,solo PVE,team PVE,best tanker,best damager,faster leveler....
Theres not a build that is the best at everything.
Anyway if you dont care about the above mentioned and think:"Bah.Save me all the bla-blah-blah...just the best"...the answer youre looking for is EM/Dark(this is the forum concensus not my opinion).
En/En - My opinion, better than forum concensus
Red Rag (see sig)! 
UNION @Flitz 50, Lead Hose 50, Red Rag 50
DEFIANT Rose Bloodthorn 34
VIGILANCE Captain Caledonia 20 - Yeah, I made toons on the French server coz we only had 4 back then (might have to transfer/recreate them on one of the US servers)
..and many more!
I'm going to give you the very dull awnswer, there are no "best" brute out there. Whatever set does not have in comparaison to another set does have something it doesn't. So, basically it just come down wich power set suit your concept, ideal of brute, how you like to play it.
If you like to be a "herder" with gazillon of mobs around you, to only leave ashes from your foe then Fire/Fire could be what you are seeking. Fire/Fire brutes in a team setup, backed up with Corruptors buff are scary. Very scary.
If you like to kill any single target as fast as possible, you may be looking at Energy Melee.
If you like to be the tough guy, Stone armor with Granite can tank whatever they want to.
Just a few examples. Hope this helps, but i'm afraid there are no best brutes. There are however defenitly some sets that are better suited depending on the situation or what you are expecting from your brute in general. If you like to "tank it" Fire armor may not be the best choice.
[ QUOTE ]
En/En - My opinion, better than forum concensus
[/ QUOTE ]
Quoted because, well, he's right. 4 powers - Total Focus, Energy Transfer, Energy Drain, Overload = win.
A En/En Brute will outdamage most things out there (I mean single target).
DEF is still a gamble, you can have a run of bad luck, but it's no where near as bad as it was post i7.
Overload - AMAZING. Boosts you HP and DEF to insane levels. I can happily tank AVs/GMs with it. I took Hasten and I can just about make a 50:50 time ratio in Overload.
Energy Drain is another great plus, once you get it you'll become able to fight endlessly excpet for HP.
En/En's main failing is no self heal, so take Aid Self (problem fixed!).
An En/En brute definatly blooms at higher levels, and can be chore pre SO's.
I love /DA for running into a mob and mez most of them, while the rest attacks you 
(on test I had CoF and OG running and used my immob patron, troller+debuffer+brute FTW 
).
It basically comes down to this:
Fire melee: AoE bruning (sweet damage)
Super strength: High single target smashing, with some AoE's, and Rage (big plus!)
Stone melee: Higher single target smashing, and better control than SS, no rage.
Energy melee: ET + TF = win
Dark Melee: No big hitter, but has a heal, end drain, fear and acc debuff.
Fire aura: Resistance set, no KB res, damage aura, and another build up. Also has a combat heal. Doesn't have an emergency button.
Invulnerability: Insane smashing resistance, some defence, low resistance against evertting else. Has HP boost + heal.
Has an emergency button. Hardly any flaws.
Dark Armor: Decent resist against all but psionics, only set with resistance against psionic (50% when slotted), no KB, stealth and +perception and the best PvE heal. Also has 2 extra debuff auras, but the set is the biggest end hog out there. Also no emergency button.
Energy Armor: Defence against all but psionic, minor resistance to some types. 2 end "boosting" powers and a cloak (not sure if it gives +perception). Has an emergency button.
Stone armor: Has granite(big plus), a hp boost + heal, some defence against psionics, a damage aura, and the ability to slow mobs. Some shields drop your running speed though.
Only elec/ and /elec left for somebody else.
im in the feild for wanting to make the perfect brute any ideas
any input would be helpful