All except one are in foil:

Richard Gradkowski (1999-2002)
Rolando Balboa (handful of lessons ~2001)
Joe Brodeth (one lesson ~2001)
Jerzy Grzymski (two lessons ~2002)
Roi Green (2002-2004)
Bin Lu (2004-ongoing)
Chris Spencer (couple lessons in 2005)
Matthew Bouloubasis (one or two lessons ~2006)
Dave Griffin (several epee lessons in 2007)
Larbi (2008-ongoing)