Wow. Alucard won? But Alucard is not a Master. The 'Master' Seras addresses him as is of Teacher (shishou- the manga gives the kanjis earlier on) aka mentor. Seras' master (in the sense the poll is asking) is officially Integra. Hirano left it clear in the manga. Even put Master and Servant over Integra and Seras to make it so.
Unless, we count his army... I suppose. But he lost that already.