The most powerful mob is the sniffer

Change my mind

I can't

Can it kill warden ? No. 

most powerful in terms of things it can do

Very useful. Though the alley is very useful. My poor alley died because it jumped in lava

sad

it is, I mean winning the vote is basically killing the rascal and tuff golem 9999 times over

because every time a rascal/tuff golem is supposed to spawn, it can;t