Have to stop you there.I'l go with lyon, but i'm really not too sure. I mean bacchus was compared to erza but lost to elfman, and lyon is equal to if not better than gray and gray would not lose to elfman.
Don't underestimate Bacchus, Elfman didn't even hit Bacchus in the fight and Elfman was grievously injured and Bacchus only had injuries to his hands. The only reason Elfman won was because of Beast Soul: Lizardman and plot as Bacchus was owning him and he wasn't even drunk yet.I want to say Bacchus but it's hard to tell if hes on par with Erza because he lost to Elfman way too easily...I'll go with Lyon.