And let's not forget Arnold Moss as Anton Karidian/Kodos the Executioner.
You mean the character from "The Conscience of the KEEEEEING!!!"
One of my favorite episodes, definitely in my Top 5, but I have to admit that---as years have gone by and I've watched it many, many times---I think Arnold Moss and Barbara Anderson were chewing so much scenery that I'm surprised the set didn't look like The Empath by the end.
Hah! This is where I shamelessly mention that I just wrote a sequel to that ep, coming out later this year, but, yeah, Kirk observes in the book that Lenore tends to get a bit melodramatic and "actressy" at times . . . .