Dear Plutarch: Indeed there is a need for the word. We all have met more than one guy to whom it would apply, the kind of guy who would die of frustration on a visit to Echo Canyon. Your " omegatist" has "egotist" in it, which I like. The only problem is that the targets don't know "omega" is last letter in Greek alphabet. Just to show I tried, I thought of "ultimatist" but isn't as good as yours.

While looking in Internet for ideas, I ran across this put-down:

http://www.abc.net.au/classic/breakfast/months/CFM_bfast_June2001.htm

Sconser

A person who looks around
when talking to you, to see if
there's anyone more interesting
about.