I would have to agree with the majority. Ganondorf has to be my favorite villain of all time. These days half or even more of the villains in games aren't even fully villains. They are those generic "I want to destroy the world because of its sins.", "I want to make a new world without discrimination", or "I am doing a good thing, but in an evil way." I'm sick of that type of villain. Ganondorf those is classic bad guy. He just plain is evil and wants to take over. Ganondorf also never dies, he just keeps coming back, he is just that powerful (ok the Triforce of Power is that powerful, but he has it so it counts).
Bowser I also find cool, although he is more so a comedy relief to me. King Dedede also is cool, but he isn't evil all that often so its hard to count him.