Most of them have different breeding styles as well so I don't think it's very possible. We only hybridize within the complexes so far but as LBF said, it's really not condoned. I've learned quite a bit since last time I suggested hybridizing a wild fish into a domestic fish and it's really not couth in the fact that the wild species are so rare nowadays, better to preserve them then to fiddle with something already perfect!
Wilds: Wajok, Rutilans, Siamentorialis, Hendra
Leopards: Luna, Astrael, Dorian, Cullen, Gallifrey
African Fat Tails: Nox and Lux
Bearded Dragon: Stormfly