I figure the black sun crime organization has a ton of fighters to field between the cloakshape, scyk, kihraxz, starviper, z95, etc. The capital ships part is harder as I find very few references and have little knowledge from books or comics myself.
I figure cr90 would certainly be something they would have, and wookiepedia says that verrry late in the legends/comics, around 137 after yavin they have possession of at least one MC80 and nebulon-b. Not sure if I want to take ships from the 150-years-later craziness that I know nothing of.
That leaves me thinking about cr90s and variations on that, gozanti cruisers though they would be a redundant role to the cr90, and some other not noteworthy cruisers. Am I missing anything? Might the Black Sun have a dreadnought heavy cruiser, victory star destroyer, anything big? I know they have enormous power in the galaxy, but maybe not in the form of big spaceships?