if you count eric as one to beat dracula, then maria beat him with doves, albus shot him dead, maxim killed him with a sword, and hell, even a weak axe armor killed him with a crappy axe.
tl'dr alternate modes don't count.
canonically it's john who beat dracula, eric was just there to help like maria in rondo.
it could be interpreted that he fought bartley trying to exact his revenge for killing his girlfriend while john went forward to fight drac himself. but that's just my imagination, there was no explaination for it other than 'lol extra modes don't count.'