With the new change to the wilderblade and limited radius I think adding some additional mobs to the available head drops would be a great idea. Also with the new mobs coming in 1.16 having some new heads to go for in the nether adds to the update. Personally I think all of the zombie variants like husks should have a head drop, but with the limit possibly coming from what mojang has made available using the MHF_<name> skins I'd like to see the mooshroom, magma cube, and iron golem heads added to the pool</name>

please add sheep too.

A little late to the party, my consideration is that Villager heads would drop the head of the profession of the villager killed rather than Generic Villager head.