One of the reasons he was such a good villain was the atmosphere that was created by him being there. He didn't speak much and spoke very clearly and calculated the few times he does and just lets his imposing presence fill in the gaps very tastefully
he wasn't born before the prequels. Also the actions that make one a villain do not make one a quality villain. their mannerisms and how their appearance plays off that are what separate the discount from the gourmet
AKA episodes 4 5 and 6.
Because make the movies, Yoda did