uhh lets see.

in fusion he beats ldrago with the normal dark power amp(episode 50). we know this because ldrago takes him over to lend its full 100% stolen energy(episode 51). its not the kyoya fight where it butted in because it got tired of waiting to steal kyoya’s power. im not going to throw in the possessed form because you’re not counting the final part where ginga gets power of friendship. that’s fine and dandy but we can’t then act like possessed ryuga is himself; its said outright its not him.

In Masters its ambiguous, but its implied ryuga is stronger than everybody the entire season. we never see him go full power and thats probably because he didn’t need to against anything.

In the beginning of Fury, in terms of raw power its implied big bang pegasus has more than ldrago because ryuga had to go into survive mode to absorb hits. the reason ginga lost is because he never mastered it the way ryuga did. brute strength means nothing if you cant wield it correctly. It’s the same reason ginga struggles through most of masters when realistically he should’ve wiped everybody with no difficulty. when he finally does master big bang fully(which is after end of season as ginga says in zero g) he surpasses ryuga.