More biome specific mobs

Some ideas for this are: an ice zombie to accompany the stray in cold regions. A fire skeleton to accompany the husk in dry regions. A water skeleton to accompany the drowned in the water. I understand that the trident drowned does a good job of this, but adding it will improve variation. Maybe even adding a set of dense jungle zombies and skeletons would be interesting. They may camouflage better, can climb simple blocks such as vines and ladders, make little noise, and maybe even spawn in groups with a collective mind so that you can’t isolate one mob from the group.