Nethroi, Apex of Death, is one of the best commanders in its color identity
Perimeter Captain Another cheap, white creature you may want to run in your defender decks is Perimeter Captain, due to its ability to gain life when you block with other defenders, on top of being a potential 1-mana 4/4 with the right support cards
This flying haste creature provides much-needed ramp in addition to consistent and hard to block damage
How useful those Blood tokens are going to be in Commander remains to be seen, but theres no opportunity cost with a card like this, so if Vampires are your cup of Blood, I recommend picking up a copy as soon as you can
It can fix mana with black and red, and it can deal 1 damage to each opponent over time
This is a great way to keep one of your strongest creatures on the board against your opponent or an even better way to steal one of theirs