Imma go from left to right

There's:
Charger: charges at people beating them into the ground until they're incapacitated

Hunter: Pounces on people from anywhere, like a hunter hunting it's prey

Spitter: spits acid, when killed pools of acid are around its body and hurts the survivors

Jockey: it jumps on the survivors' back and rides them into danger

Tank: biggest almost like a mini boss can swipe the survivors of their feet's and throw rocks and debris at them

Witch: let's out cries if disturbed can incapacitate the survivor in one hit with her sharp claws

Boomer: throws up bile on the survivors blinding them for a limited time does the same when killed it explodes

Smoker: typically used as the sniper in the group easily distinguishable by the smoke and coughing strangles the survivors by using their tongue to snatch them

CoralineJxnes

There are also
But their just common