@ Riot; You can always try out Yoshi, he's a very technical character. With DJCC, ECE, Egg throw sliding, Chain grab to Fair spike/Usmash, Yoshi bomb cancelling, Infinite jumping, Dragonic Reverse, Dragonic trotting, and some other ATs I don't feel like mentioning 
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Not to mention those are all Yoshi specific ATs, he also can do usefull non-specific ATs like Shutter stepping, pivot grabbing, dash pivot cancelling, etc.
@ Jski; Switching from Sheik to Zelda is good, but you need to work on your edge game with Sheik for early gimp kills. Fairs and weak Bairs have a good trajectory making them good for killing at early percentages off stage. Try tether hogging more, which is using your tether recovery to edge hog, this makes it so that your opponent's recovery cannot connect with the edge and they cannot knock you off the ledge because your chain is not a hurtbox. Which can help agianst vertical recoveries like Mario and Marth. You can find perfect examples of gimping and tether hogging inGimpy's combo vid
