He can definitely beat quite a lot of them, considering the difference in strength between some Commanders is staggering. The fact that Moriah was able to get out of a fight with Curiel without any damage shows that much. If Katakuri and even Cracker are a good sense of scale, he won't be beating any of the Yonko 2nd-in-commands such as Marco, King or post-TS Shiryu though.