You think Wormed sounds like Cookie Monster? I'd say more like gurgling space sludge on a distant planet in a distant galaxy. Really the only band that I've found that fits the Cookie Monster vocals moniker is Omnium Gatherum. That vocalist really literally sounds like our Sesame Street friend to my ears.
On a side note, I can't believe the vocalist to Defeated Sanity has a Mortician shirt on... they suck. I saw them live in the '90s and it was the worst concert I've ever been to. Half the set was Horror movie sound bites, the vocalist was so quiet nobody could hear him, and they used a drum machine live. Nobody even moshed.
Hmm!!! I like weird vocals. As weird as possible. I do like the vocals of Defeated Sanity, Devourement, Aborted, Abominable Putridity, Wormed.. I just love the growls, pig squeals etc.
Not, heard of any mortician album but as the saying goes, 'If a good death metal band member is wearing a band tshirt, that band better be good."