I don't really understand marbling. But IME non dragon marbling is more pale/flesh and sometimes can be yellowish. While dragon marbling turns them into red/brown as well as pale. Your male looks like a dragon (not clear) so I'd suggest pairing him to a metallic or a dragon.
I need to point out that I don't like marbles and I don't know how to manipulate the marble genes. But I spawned a non marble pineapple dragon to a copper and came up with red/brown marbles.
This guy was copper
Rose are worse than DT in terms of genetic defect. It's OK to create them but never spawn them because they will cause many problems. You may be able to spawn a "half" rose to a less ray branched fin like dT.... but I wouldn't take the risk.