Of those I've tried:
Drum kit, as you are doing 4 different things at once (assuming you have two hands and two feet!): I could just about keep 3 going, but add in the 4th and it all went AWOL!
And my dearly beloved button accordion, different notes when you pull and push and no repeating sequence as on a piano keyboard, basses not matching the right hand, etc, etc. Mine is fully chromatic, so, in theory I can play in any key, but it's just knowing where the likes of D# are when needed.
I did once try Uillean pipes, but my fingers wouldn't stretch far enough, nor for low D whistle.