here's some platformers I think are better than DKC2
Super Mario Bros 3
Super Mario World
Donkey Kong Country
Sonic 1
Sonic 2
Sonic 3 & Knuckles
Ristar
Rocket Knight Adventures
RKA and DKC2 are pretty close, I could actually go either way on those two. The rest I'm sure I like more. All of these games are really good though.