I'm a scrapper at heart, so I'd recommend a Katana/Regen or Claws/Regen scrapper (played both to level 50, and either sounds like everything you are looking for - very gazelle, no gorilla) or even a Fire/Shield scrapper. For a tank, however, I think you might enjoy Fire/SS. It sounds like you get bored with the bash when soloing just like I did with many of my tanks, but I think you'd enjoy playing that combo. I have a level 50 Invul/SS and a level 33 Fire/EM tank. Both are pretty darned fun to solo, the only issue being lack of KB protection on FA. Also, you have to have patience with tanks because they take time to develop, which can be pretty hard if you're a blaster at heart and feel the need for speed. Anyhow, that's just my personal experience with it. Good luck to you! Hope you find a tank that fits!