I think RC winners would be Hunsobo, Woldrun, and Feilinal, like Isildur said. Actually looking back it looks like Feilinal didn't win any RC's. I don't recall if Iltanthal did.

The interesting part on the RC's is Bonthos and Woldrun's roles - neither are ones that I, myself, would probably reward. While Feilinal and Bonthos' I'd have been all over with RC-winning-lovin'. Different tastes.

As for leaders, since I've been back...hmm. Five that I can think of.
Hunsobo
Fobrin
Feilinal
Iltanthal
Woldrun

Well Meagara might count as "since I've been back" - I wasn't back as Twist, but it was after my hiatus.

As for prior to that hiatus, I had several. I doubt I could remember them all.