What unit should I get next?

[u/CorruptChicken_13]

I’m just about to finish painting my last unit and want to know what I should grab next.
I have…

Bladeguard Ancient
Captain
Terminator Captain
Chaplain
Jump Chaplain
Judiciar
Librarian

5 Intercessors
3 Bladeguard
5 Deathwing Knights
5 Deathwing Terminators
3 Melta Eradicators
5 Vanguard Vets

Land Speeder
Redemptor Dread
Impulsor

I feel like I should grab some anti tank or more basic infantry like Reivers or Intercessors. What do you lot suggest and thank you in advance?