High skillcap champion?
I'm trying to gather a list, and off the top of my head I would probably say Azir or Yasuo.
Azir's early is weak and lacks kill potential. Once you do get some farm and items on him, he is so flashy and can dish out some serious damage if mastered. #azirsec
While some people may argue that Yasuo isn't hard to play, I certainly had a hard time learning him. His kit has no sustain besides his shield if you count that. Usually I have to run Dorans Blade and 2x Lifesteal quints to survive until I pick up his core items. His E is also tricky to use. His e will only let him get away if the minions are positioned right so plan your engage and make sure to ward.
That was only my opinion. What is yours?





