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

Abbot, Geoff	London (thanks, Misto Kitty!)
Ambler, Jim	Broadway (thanks, Misto Kitty!)
Amirante, Robert	Broadway (thanks, Cicero124!)
Armand, Kautzky	Budapest (thanks, Misto Kitty!)
Ashley, David	New London Theatre, West End (thanks, Chienettaleah!)
Aston, Lance	London (thanks, Misto Kitty!)
Barton, Steve	Vienna 1983 (thanks, Anna and Brandlhofer!)
Batt, Bryan	Broadway (thanks, Cicero124!)
Berdini, Kevin	Understudy (thanks, Misto Kitty!)
Bernando, Keith	Broadway (thanks, Misto Kitty!)
Bishop, Peter	London 1992 and U.K. Tour (thanks, Ivy and Whimsey!)
Bowles, John	Singapore touring company (thanks, Yi-Peng!)
Boynton, Kyle	Amsterdam (thanks, Whimsey!)
Burleson, Stanley	Amsterdam (thanks, Anna!)
Carrasco Felix, Omar	Mexico (thanks, Misto Kitty!)
Challis, Peter	London (thanks, Misto Kitty!)
Christenson, Job	Broadway (thanks, Cicero124!)
Clausen, Paul	Touring Company 1999 (thanks, Connie!)
Clemens, Randy	Third National (thanks, Snar71!)
Cormick, Michael	Australia (thanks, Ruth!)
Cousins, Robin	West End (thanks, Adrian!)
Dainton, Scott	1st U.S. Tour (thanks, Misto Kitty!)
Dawley, Kyle	Leaping Frog Drama Company (thanks, Kate!)
de Groot, Roberto	Antwerp understudy (thanks, Whimsey!)
Denman, Jeffry	Broadway (thanks, Taylor!)
Dovey, Mark	1st U.S. Tour (thanks, Misto Kitty!)
Driver, Kip	Tour 1998 - Early 1999 (thanks, Cats!)
du Crocq, Corné	Amsterdam understudy (thanks, Whimsey!)
Dubreuil, Dustin	Hamburg (thanks, Misto Kitty!)
Engelfeldt, Peter	Sweden (thanks, Misto Kitty!)
Engell, Harvard	Norway (thanks, Misto Kitty and Jemima!)
En'oka, Shintarou	Tokyo (thanks, Whimsey!)
Farnsworth, Matt	Broadway (thanks, Misto Kitty!)
Fotopoulas, Mark	Broadway (thanks, Cicero!)
Fredericksson, Jörgen	Hamburg (thanks, Whimsey!)
Gardiner, Jason	West End (thanks, jcsmith49!)
Gillard, Jason	Tour 1997 (thanks, Cats!)?
Gillman, Jason	U.S. Tour (thanks, Misto Kitty!)
Gi Ryun, Do	Original Seoul Cast (thanks, Misto Kitty!)
Groener, Harry	Broadway
Gruber, Michael	Broadway
Hadobas, Paul	Zurich (thanks, Misto Kitty!)
Halliday, Andrew	London (thanks, Misto Kitty!)
Heshour, Robert	Broadway (thanks, Misto Kitty!)
Hoelen, Frank	Amsterdam understudy (thanks, Whimsey!)
Hogstram, Glen	Australia (thanks, Jack!)
Houghton, Stephen	London (thanks, Cicero124!)
Jan de Graaf, Jacob	Antwerp (thanks, Whimsey!)
Jaye, Tee	Hamburg (thanks, Misto Kitty!)
Jenkins, Tommie	Hamburg (thanks, Whimsey!)
Jessner, Matthew	Paris, Vienna, and an Antwerp understudy (thanks, Misto Kitty, Anna, and Whimsey!)
Jones, Louis	Leaping Frog Drama Company (thanks, Kate!)
Kirby, Davis	Tour (thanks, Cats!)
Knese, Michael	Hamburg (thanks, Misto Kitty!)
Kriefall, Hans	Understudy (thanks, Crzy4Fishy!)
Lćgreid, Haldor	Hamburg (thanks, Whimsey!)
Landeta, Manuel	Mexico (thanks, Bernardo!)
Larson-Disney, Michael	Hamburg and Zurich (thanks, Whimsey and Misto Kitty!)
Leigh, Vincent	London (thanks, Misto Kitty!)
Loras, Robertino	Buenos Aires (thanks, Whimsey!)
Lundahl, Ferdinand	Hamburg (thanks, Whimsey!)
Malek, David	West End (thanks, Misto Kitty!)
Marshall, Rob	Broadway (thanks, Cicero!)
Martin, Gary	London (thanks, Misto Kitty!)
McCoy, Dan	Broadway and Original U.S. IV Tour (thanks, Misto Kitty and Whimsey!)
McCready, Kevin	U.S. Touring Company (thanks, Misto Kitty!)
Minahan, Greg	Broadway (thanks, Misto Kitty!)
Miranda, Bobby	Tour (thanks, Cicero!)
Morales, Mark	Los Angeles (thanks, MistacorCat and Whimsey!)
Morrisey, Bob	Broadway (thanks, Cicero124!)
Mors, Hans	Amsterdam (thanks, Whimsey!)
Murray, Joseph	Hamburg (thanks, Misto Kitty!)
Myers, Japheth	Understudy at Hamburg (thanks, Veermima)
Newsome, Grant	Paris, Zurich, Hamburg (thanks, Anna!)
O'Keefe, Anthony	Australia (thanks, Cicero124!)
Partridge, John	Hamburg (thanks, Dragonfly!)
Patterson, James	U.S. Touring Company (thanks, Misto Kitty!)
Pauditis, Bela	Hungary (thanks, Misto Kitty!)
Perry, Shaun	Tour (thanks, Cats!)
Pettyfer, Richard	Australia and Hamburg (thanks, Cicero124 and Whimsey!)
Pike, Matthew	Hamburg (thanks, Misto Kitty!)
Qualls, Rick	Hamburg (thanks, Misto Kitty!)
Rebaldi, Jack	West End 1998 (thanks, Jemcetera!)
Rebaldi, Jean-Luc	West End (thanks, Yi-Peng!)
Reynolds, Neil	German Hamburg Tour (thanks, Nicola!)
Rintamaki, Arto	Finland (thanks, Misto Kitty!)
Robinson, Darryl	Vienna (thanks, Misto Kitty!)
Romagnoli, Fabrizio	Stuttgart understudy (thanks, Whimsey!)
Rudolz, Hartwig	Hamburg (thanks, Adrian!)
Sangiovanni, Michael	Tour (thanks, Cicero!)
Shankley, Jeff	West End (thanks, Yi-Peng!)
Shepard, Ryan	Tour (thanks, Cats!)
Spangenthal, David	Understudy (thanks, Crzy4Fishy!)
Sprague Jr., Billy	Understudy (thanks, Crzy4Fishy!)
Stafford, Spencer	London (thanks, Misto Kitty!)
Staudenmayer, Edward	Hamburg (thanks, Misto Kitty!)
Sundberg, Nils Olof	Stuttgart understudy (thanks, Whimsey!)
Sutherland, Brian	Broadway (thanks, Misto Kitty!)
Sylvia, Abe	Broadway
Taylor, Scott	Broadway (thanks, Misto Kitty!)
Tessier, Claude R.	Broadway (thanks, Cicero124!)
Tonk, Siegmar	Hamburg and Stuttgart (thanks, Misto Kitty and Whimsey!)
Turner, Grant	U.S. Troika Tour (thanks, Whimsey!)
Vargo, Matthew J.	Broadway (thanks, Cicero124!)
Waletzko, Craig	Understudy (thanks, Crzy4Fishy!)
Welp, Willy	Hamburg (thanks, Misto Kitty and Anna!)
Wengel, Alexander	Stuttgart (thanks, Vanessa!)
Williams, Liston	Hamburg (thanks, Whimsey!)
Wood, Barry	Toronto (thanks, Whimsey!)
Wood, Patrick	London (thanks, Misto Kitty!)
Woodford, Richard	London (thanks, Misto Kitty!)
Wright, Andrew	London (thanks, Misto Kitty!)
Zinsmeister, David	Understudy at Hamburg (thanks, Veermima)