For me, I'd say Kyle Katarn and the associated gang from the Dark Forces world (Jan Ors, the Seven Dark Jedi, Rahn and Morgan Katarn) without a doubt.

Desann and Tavion I could take or leave... but I'd like to have them thrown in too, if possible.

Maybe not Rosh, though. :P

Also... does anyone else think Kyle should dual-wield, using his two different lightsabers from Mysteries of the Sith and Jedi Outcast? (It's always been my personal head-canon that he built the blue saber just to learn how to make one.)