Albino Black Shark (Only this type) - past the delicate 2 inch stage.
Silurus - preferably rarer types - S. biwaensis, especially - This is a tough find, but you seem like a man that likes a challenge!
Albino / Marbled Climbing Perch (Anabas)
True Chocolate Cichlids
True Chanchito (facetum) Cichlid
Just a shout out - let me know if any of these are obtainable. Thanks!