So far i'm using him always with Nico.
Corpse generation (+ the Emmisary), Fresh Meat, chatty and Fling rot as a Setup for later Shikome charges (my go-to Beater Summon) are a realy nice and round package.
Sure others might do some aspects better, but no one brings the whole package.
Wave 5 brings some pretty good contenders though. If your just looking for Corpsegeneration, Emmisary, Kentauroi and Asura are realy realy strong.