Ian McDiarmid for the prequels and for half of ROTJ with James Earl Jones getting the other half. For the sequels Mel Brooks did a great job as Yogurt.
I can answer almost all questions anyone might have about the Sith from Star Wars Legends, and please do PM me for the bd25 DEED(Despecalised Editions), as I have this version, though I can’t answer technical questions about them. Auntie Derry/Rumpelstiltskin.
Do not go gentle into that good night, Though wise men at their end know dark is right, They
Do not go gentle into that good night. “Stay Phrosty” - Lemar Kentell, my other half. Feel the love.