For all round good looks got to be Oblivion.
Farcry - so so, take that engine out of the tropics and its not so great.
HL2 - very reasonable all round graphics, just lacking some of the modern touchs like HDR.
Fear - Alright, nothing special really, not a particularly efficient engine.
UT 04 - nice and polished but rather dated.
NFSMW- Nice cars, average everything else.
Doom 3 / Quate 4 - Rather Dark, hard to appreciate the good engine.