Stallord. Maybe the most fun and exciting boss ever in Zelda. So unique.
Ganon OOT. Just because its OOT.
Ganondorf WW. Jamming your sword into his skull will never get old and is one of the most shocking scences ever in Zelda.
Jahalla because he's the boss in those zelda games that u have to beat creatively. He was fun to slice up in four swords adventure, and fun to destroy his little poes that made up his body in the wind waker. THUMBS UP
I'm going to say Demise. I'll admit when I first fought him, I had trouble figuring him out. But the lightning, epic music, and climatic finish makes it one of the most memorable final bosses in recent history.