There are lots of wishes...
Definitely Vangelis and Schiller, Karl Bartos, Michael Rother or Wolfgang Flür would be nice as well, Mike Oldfield, Rick Wakeman & Jon Anderson. Someone mentioned Trevor Horn, that would be interesting... I absolutely second Pet Shop Boys.
Client would be interesting as well, not to forget Michael Cretu. Peter Gabriel, Larry Fast, Human League, OMD, Alan Parsons maybe Kitaro, Eroc or Jeff Wayne. And from France Alizée and Zazie.
93 Berlin I/95 Paris/97 Stuttg.,Munich,Oberh.,
Frankf./02 Aalborg/08 Franf.,Zurich/09 Koblenz,
Treves, Munich,Zurich/16/17 Frankf.,Berlin,