Well, if the party is still in need of a brute, though, I can also go with angel of decay 2/vasuthant 2/wight 2. It would have 26 charisma and gain the modifier from it as bonus HP per level, a bonus on saves, a deflection bonus on AC, a natural armor bonus on AC, and bonus damage on each attack (it has four natural attacks). It would be an in-development creature, but after a couple more levels, I'd be able to start giving it totemist and other shiny levels.
Oh, and it would have blindsight 30 feet and cause the 60 feet to be shadowy (thus protecting the vampire) and force 3 re-rolls per day. And can cause 1d3 Str damage with a successful slam attack (Fort 21 to negate) up to 48 times per day. Fly at 30 feet... the perks kind of go on for a while.
After cursory research, I've found that I can add a bite attack, a gore attack and rending damage to that list, making it a total of 2 slams, 2 claws, 1 bite, 1 gore, 2d6 rending if both claws hit and all natural attacks count as magic weapons for overcoming DR. If I did go with Totemist, then at level 9, I could add a tail attack and 2 tentacle attacks to that list.