My vote here goes for Sears. Although Faye is way hotter, Seras kicks more ass, so she gets the vote.
Tasker: Both are fantastic series, especially Bebop, i cant recomend this highly enough.
As for Hellsing, the TV series is pretty good, but strays away from the manga as it goes on. But the new OVA series thats coming out, stays truer to the manga, and seems more entertaining to me.