If you know of anyone not listed here or have more information on any of them, please tell me. Thanks!

Angel Elías, Miguel	Buenos Aires (thanks, Whimsey!)
Arnold, Michael	Broadway (thanks, Misto Kitty!)
Atkins, David	1990 in Australia (thanks, Jellylorum!)
Baker, Dale	Original Melbourne Cast (thanks, Whimsey and Misto Kitty!)
Balogh, Ferenc	Hungary (thanks, Misto Kitty!)
Baraian, Valentin	Original Vienna Cast (thanks, Whimsey and Misto Kitty!)
Barriskill, Michael	Broadway (thanks, Misto Kitty!)
Barry, Brian	1998 Tour (thanks, Bombalurina!)
Baxter, Luke	London '92, First U.K. National Tour '89-'90, and West End '91-'92 (thanks, Ivy and Jomacdonnell!)
Beaulieu, Alexandre	Toronto (thanks, Whimsey!)
Bernal, Barry	Broadway (thanks, Misto Kitty!).
Bethke, Lars	Sweden (thanks, Mrs. Mistoffelees!)
Brent, Jacob	Broadway
Buffum, Eddie	Original U.S. IV Tour (thanks, Whimsey!)
Burke, Billy	Australia (thanks, Misto Kitty!)
Burke, Liam	West End (thanks, Misto Kitty!)
Burnett, Jonathan	Amsterdam understudy (thanks, Whimsey!)
Byker, Brett	Leaping Frog Drama Company (thanks, Kate!)
Cassati, Andrea	Hamburg understudy and Stuttgart understudy (thanks, Jay and Whimsey!)
Cazettes, Jean-Claude	Amsterdam understudy (thanks, Whimsey!)
Chai, Raymond	Zurich (thanks, Misto Kitty!)
Chambers, Lindsay	Zurich and Broadway (thanks, Gretchen!)
Channon, Paul	Understudy at Hamburg (thanks, Veermima!)
Clemete, Rene	Broadway (thanks, Cicero124!)
Collen, Derek Joshua	West End (thanks, Misto Kitty!)
Copeland, Chris	Understudy (thanks, Veronica!)
Davies, James	West End (thanks, Misto Kitty!)
Davis, Randy	U.S. Touring Company (thanks, Misto Kitty!).
de La Pena, George	Los Angeles (thanks, MistacorCat and Whimsey!)
de St. Germain, Guy-Paul	Amsterdam (thanks, Whimsey!)
de Souter, Machael	West End (thanks, Whimsey!)
Dunlaing, Daire	Hamburg (thanks, Misto Kitty!)
Engran, Marvin	National Tour (thanks, Veronica!)
Esposito, Mark	1987 Tour (thanks, Matt!)
Farnsworth, Matt	Access Broadway (thanks, Zephrah!)
Favalora, Joseph	Tour (thanks, Cicero!)
Festa, John	U.S. Touring Company (thanks, Misto Kitty!).
Fletcher, Graham	London (thanks, Cicero124!)
Flowers, Ramon	Understudy (thanks, Crzy4Fishy!)
Gattelli, Christopher	Broadway
Genet, Jean-Marc	Amsterdam and Paris (thanks, Whimsey!)
Goldberg, Jon-Erik	Tour (thanks, Cats!)
Gomez, Humberto	Mexico (thanks, Misto Kitty!)
Goo, Seo Byung	Original Seoul Cast (thanks, Misto Kitty!)
Gregory, Michael Scott	Broadway (thanks, Cicero!)
Gudino, Omar	Understudy at Hamburg (thanks, Veermima!)
Gudium, Ketil	Original Oslo Cast (thanks, Whimsey and Misto Kitty!)
Gyondla, Joey	Understudy (thanks, Crzy4Fishy!)
Hadley, James	Tour (thanks, Cats!)
Hall, Chris	Australia (thanks, Ruth!)
Hayes, Sean	Hamburg (thanks, Whimsey!)
Hee, T.J.	Zurich understudy and Hamburg (thanks, Jay!)
Heikkinen, Harri	Finland (thanks, Misto Kitty!)
Hernandez, Guillermo	Mexico (thanks, Misto Kitty!)
Horiuchi, Gen	West End (thanks, Yi-Peng!)
Howes, Douglas	West End (thanks, Misto Kitty!)
Janki, Devanand	Broadway (thanks, Misto Kitty!)
Jimenez Sanchez, Juan	Hamburg and Stuttgart (thanks, Veermima and Jay!)
Johanson, Don	Broadway (thanks, Cicero!)
Johnson, Neil	West End (thanks, Misto Kitty!)
Johnstone, Billy	Broadway (thanks, Cicero124!)
Kachel, Roger	Understudy (thanks, Crzy4Fishy!)
Kacperski, Damian	Hamburg (thanks, Misto Kitty!)
Lester, Todd	Broadway (thanks, Cicero!)
Logan, Fergus	London 1997 (thanks, Ivy!)
Lupien, Dennis	Hamburg (thanks, Whimsey!)
McIsaac, Gerald Michael	Canada and U.S. Tour (thanks, Misto Kitty and Teazer Kitten!)
McKenzie, Campbell	London (thanks, Veermima!)
McPherson, Jerermy	Singapore and tour (thanks, Yi-Peng!)
Moreau, Mark	Tour (thanks, Cats!)
Morgan, Karl	Hamburg (thanks, Misto Kitty!)
Morrison, Leighton	Understudy at Hamburg and Stuttgart (thanks, Veermima and Whimsey!)
Mullaney, Patrick	Understudy (thanks, Crzy4Fishy!)
Myers, Japheth	Hamburg understudy (thanks, Jay!)
Norris, Wayne	Stuttgart understudy and first Pouncival (thanks, Jay!)
ó Dúnlaing, Dáire	Hamburg (thanks, Whimsey!)
O'Kelley, McCree	U.S. Troika Tour (thanks, Whimsey!)
Ochoa, Steve	Broadway (thanks, Misto Kitty!)
Osami, Iino	Original Tokyo Cast (thanks, Whimsey and Misto Kitty!)
Paton, Thomas	London (thanks, Cicero124!)
Paul, Guy	London (thanks, Cicero124!)
Pearce, Clinton	Hamburg (thanks, Veermima!)
Pesce, Vince	U.S. Tour (thanks, Misto Kitty!)
Poe, Kevin	Broadway (thanks, Cicero!)
Porter, Paul	Hamburg (thanks, Adrian!)
Pulkkinen, Jyri	Finland (thanks, Misto Kitty!)
Reeder, Kim	West End (thanks, Whimsey!)
Rivera, Angelo	Tour (thanks, Cats!)
Sanchez, Juan Jimenez	Stuttgart (thanks, Whimsey!)
Scott, Timothy	Broadway
Sebek, Herman	Broadway (thanks, Misto Kitty!)
Sell, Chris	Tour (thanks, Cats!)
Sermonia, Julius	Touring Company 1999 and Broadway (thanks, Connie and Bombalurina Aerin!)
Sleep, Wayne	West End (thanks, Yi-Peng!)
Slovacek, Randy	Original U.S. III Tour (thanks, Whimsey!)
Spence, Louis	London (thanks, Jos!)
Stein, Cliff	London and Antwerp (thanks, Ivy and Misto Kitty!)
Tatad, Robert	Hamburg (thanks, Misto Kitty!)
Taylor, Jonathan	Understudy (thanks, Crzy4Fishy!)
Torcellini, Jamie	Broadway (thanks, Cicero!)
Toth, Oliver	Australia; Antwerp understudy (thanks, Jack and Whimsey!)
Tullock, Devon	Understudy (thanks, Devon!)
Tyrell, Benjamin	Hamburg (thanks, Misto Kitty!)
Van der Straeten, Tim	Hamburg (thanks, Misto Kitty!)
Weigel, Thomas	Hamburg (thanks, Whimsey!)
Wise, Scott	Broadway (thanks, Cicero124!)