Originally posted by Gideon
It's possible that Ragnos was a source of inspiration. The Dark Empire Sourcebook implies that Ulic Qel-Droma was a personal hero for Sidious.
You sure it was the sourcebook and not at the back of the DE comics? I remember several tidbits about Ulic in the comics, but can't recall any from the sourcebook. I'd like to check it out when I get home - 'cause that'd be interesting.