These are all the Avengers figures from Wave 1 of Disney Infinity 2.0 releases. I have all of them.
Iron Man, Captain America, Hulk, Thor, Hawkeye, Black Widow
I found the fighting mechanics in this game pretty fun. All the playsets (Avengers, Spider-Man and Guardians of the Galaxy) were interesting too. Hulk was the first character I had to have but I eventually got them all. Iron Man was probably the most useful character to play as. Hulk could sort fly with his huge leaps but Iron Man could legit fly. So could Thor, come to think of it, but Iron Man had better missile weapons.
There are two more Avengers that came out in the Wave 3 of releases, but I'll get to those later. This is the core team.
I never played the Disney Infinity games past the first one.
I like them all. Maybe I like DI 2.0 best though for the fighting mechanics.
I remember a PS2 game with Hulk that was basically Rampage in 3D platformer form ... Forget the name, but Previously Recorded ( YouTube channel related to Redlettermedia) played it recently. That was a fun game.
My friend Mark loved that game. I might have played it too, but I don't remember. I just remember watching him play it a lot. I'd like to revisit it sometime. Maybe I have a copy around here somewhere.