I've been able to run quite a bit of stuff as a fury warrior with TG. Spec out with talents boosting self-heals, glyph for it too, and you can do quite a bit. I've found the main thing being biting off the right sized pieces. A fair example being Mag Terrace. I CAN pull a whole room sometimes.... and get away with it about 80-90% of the time. I'd say the key is approaching encounters with a plan as to how you want to tear it down.
There's some stuff you just can't solo though. Black Temple.... reliquary of souls or whatever that boss is.... second phase is a killer. Same with Gorefiend. Just has some mechanics that are nasty. Same is true of BWL..... first boss is pretty much the killer as you "can't" solo it (not without someone MC'ing the boss).
There are some good challenges out there though.
No one tanks in a void.........