Ok so are you looking for a tribal lord or someone to go with your color scheme? Because honestly there are a lot of legendary vampires out there. Here are six legendary vampires that you might be interested in. Their effects are good and they'd make great commanders as well.
1.
Anowon, the ruin sage is good for field control without having to waste your destroy spells on small fry.
2.
Kalitas, bloodchief of ghet is a good commander who thins your opponent's rank while increasing yours without putting himself at risk.
3.
Drana, Kalastria bloodchief would be good for spot removal and she helps beef up your smaller vampires to get some early game damage goiing. Also if you've got vampires that trample and/or have
lifelink it would be a great way to stay ahead of your opponent without having to get directly involved in combat.
4. Mirko voss is definitely worth having if you want to add the mill element to your vampire deck. It's a U/B vampire so he'd have plenty of support and your opponent's deck would grow thin very quickly. I played against him in a tournament once so i'm speaking from experience.
5.
Olivia Voldaren if you want to keep your red and do some snatch steal action going on with the enemy's creatures.
6. Kish val the
blood arbiter has the control element to him (being W/B this helps) but if you stick to a snatch and steal typw of play style you can steal your opponent's creatures and then sacrifice them for his effect and use his effect t wipe out the other ones that are causing you problems.