A proponent, a mad propster, one who cannot stop extolling what he/she perceives as the various virtues of a person or thing, an ad man, a publicist, a praise singer.
"Jerome asked Jane who was the lord-high Continuous Improvement hooey spewer for their department because he didn't want to miss the deadline for turning in his Kaizania '08 Action Sheet."
Today's word, hooey spewer, is actually a phrase (see how there's, like, more than one word?). It is derived from "hooey" meaning horse shit and the verb to spew, meaning to spit, spray, or shoot forth. A hooey spewer is one who gets shit all over everything. On purpose.