The ones I can think of right now, in alphabetical order: Yves Castagnet, Sophie-Véronique Choplin, Lorenzo Ghielmi, Ludger Lohmann, Ben van Oosten, Louis Robilliard, Daniel Roth, Stefan Schmidt, Stephen Tharp.
And for improvisation, I'd say Frédéric Blanc, David Briggs, Thierry Escaich, Naji Hakim, Philippe Lefèbvre, Loïc Mallié, Pierre Pincemaille, Louis Robilliard, Daniel Roth, Stefan Schmidt, Wolfgang Seifen, Ansgar Wallenhorst.