Next units to add to SW pile of shame

I have the following in my built but unpainted SW army and looking what to add to the list as a soon to be birthday treat. Was thinking of a tank of some description for some ranged anti-tank support but could do with your thoughts.

Ragnar Blackmane

Arjac Rockfist

Wolf Guard Battle Leader

Wolf Priest

20x Blood laws

10x Grey Hunters

10x Wolf Guard Terminators

5x Wulfen

3x Wolf Guard Headtakers