Sonic
Sonic the hedgehog
WTF, there are no Sonic games on SNES, Nintendo and Sega having been rivals back then.
Maybe these are unofficial fangames or ROM hacks?
Anyways, here is my TOP 4 (as I am not that of a SNES player):
1. The Legend of Zelda: A Link To The Past (easily one of the best SNES/GBA games ever) / The Legend of Zelda: Parallel Worlds, an impressive hack of this game with a completely new adventure.
2. Mortal Kombat 3 (... well, there's enough said about it, I presume ^^)
3. Super Mario All Stars + World (Super Mario 2 is the only game of this compilation tht actually works on E2SNES9X)
4. Super Bomberman 5