Anime-wise, likely Hakaishin Toppo due to how pathetic Sidra was treat, being genuinely intimidated by Freeza. Manga-wise, it's suggested Sidra's still relevant enough to his peers that he can endure a few hits from other Hakaishin and seems to have the best defensive technique of the 12, so if Hakaishin Toppo is still in the manga, I doubt he'd be Sidra's level.