I have to go with Gohdan. I knew pretty much what to do right away, because he's so much like that hand-boss-thing from Super Mario 64. Plus, I found him to be somewhat fun.
The other bosses gave me trouble, but this guy was a piece of cake.
Jalhalla was easy, so was the WW gannondorf (TOO EASY!) I mean not much to do, I beat WW gannondorf in liek under 3 minutes, they just made him way too easy.
Kalle Demos was the easiest boss for me. You just slice the obvious vines with the boomerang and hit the little flower thing. Its vine attacks are easily avoided or don't hit you at all when you are close to the walls of the room. Unlike most people here I thought Jahalla was difficult the first time. How did you know you can pick him up and throw him? I didn't think of it and was just trying to attack him with no result .
Despite it 'supposedly' being very hard, I actually had no trouble whatsoever with the snake ganon, and defeated it within just a few seconds.... so i was tempted to vote for that. However, I may have just been lucky with my aim, plus I was **** scared anyway lol, so I voted for Kalle Demos
I voted for Kalle Demos, Jalhalla was second easiest. I only got hit once and it was because I had to scratch my nose.
Gohma can actually be annoying if you're not quick enough