Loge is the intellectual in the Ring. He's completely cerebral, uninfluenced by any emotion except amusement. That makes him refreshing in a Wagnerian cosmos, although someone like that in real life might be diagnosed a sociopath.Hans Sachs - because of his humanity he exhibits as well as the personal growth of his character throughout the opera and reflected in the microcosm of the Wahn monologue. The most sympathetic character in Wagner for me.
Loge also gets a vote for importance beyond superficial appearances - he is certainly not a well-developed character in the narrative but central to the entire Ring plot behind the scenes.