The Clown Prince of Crime, The Agent Of Chaos, The Harlequin of Hate, The Ace of Knives, The former Red Hood. He killed the second Robin, Jason Todd. He paralysized Barbara Gordon. If you name something truly horrible in the Batman Universe, this guy is probably responsible. I'm talking about the Joker, of course and I'm compiling the best incarnations of this killer clown in the post below.
The Whacky, Barefoot Richardson Joker
Kevin Michael Richardson is normally forgotten in his role as the Joker, but not here. A black guy finally gets to be the Joker.
The Campy Romero Joker
I prefer his more scary counterparts, but you have to give Cesar Romero a nod. An entire geeration grew up loving his wild energy and the fact that he wouldn't shave hsi mustache.
The Silly and Crazy Nicholson Joker
If Jack Nicholson could have done his Joker sometime outside of the the 90's, I'm pretty sure he would have been number one on this list. As it is, Nicholson had to deal with some cumbersome face prothetics and a weird music video wedge right in the middle. His placement on this list has nothing to do with Nicholson's performance and everything to do with Nicholson dancing while splattering paint on paintings.
The Creepy, Crazy Hamill Joker
A serialized Joker, in my opinion, is the best way to do Joker. Luke Skywalker, Mark Hamill knocked it out of the park with his Joker. It was a very politically correct Joker, but you felt like he could have been the Joker from "The Killing Joker." His crazy and mean and you got glimpses of him being old and vicious, beating on Harley Quinn. He was funny, scary and almost perfect.
The Just Plain Scary Ledger Joker
Surprise, Surprise. A twenty-something who loves the Ledger Joker over the Nicholson Joker. Call me wrong. It's okay, but I feel like Heath's Joker is the best kind of Joker. This Joker wasn't a funny Joker. He did funny things, but he was a criminal, first. He felt worthy of Batman while more silly Joker don't. Some people love that. Some people don't.