I am now questioning Roy's lack of crest
If you want to know for sure whether he has the gene for crest or not, you could test-mate him to see.
Breed him to some hens that have no crests at all (any of the common breeds or mixes that have no crest or tuft.)
If he produces any crested chicks with those hens, then he does have the crest gene, whic means he also has a crest (just so small it's not obvious.)
If you hatch more than about 6-8 chicks, and every chick has a crest, then the rooster has two genes for crest, because he gave one to every chick. That is the way a Cream Legbar rooster is supposed to be.
If he produces 50% crested chicks and 50% not-crested chicks, then he has just one gene for crest and one for not-crest, which is not really what you want.
If he does not produce any crested chicks when bred to non-crested hens, then he does not have the crest gene. A rooster with no crest gene will give that to every one of his chicks, so they will all carry the gene for no crest, even if they show a crest themselves (crest gene from mom, no crest gene from dad, for this example.)
Regardless of what crest genes he has, if he is very good in other respects, it might be hard to find a good replacement for him, because you would want one that is just as good in all the other points (not sacrificing some other quality to try and get a better crest.)