Cheetah at Wild Adventures. I was just there on Sunday, Pat Benetar was doing a concert and all I heard all day long was how "crowded" the park was. We never waited more than 2 or 3 trains for any coaster in the park. If this is crowded to the Wild Adventures regulars, I'd have loved to see it not crowded.
I seem to have a knack for hitting parks/rides on short lines. I took my family (from PA) to IOA last March and we walked on to Spiderman! It was so empty that he let the 4 of us ride in one car alone, pretty cool!
I've been to BGT, SWF, SFWOA, Kennywood, Wild Adventures, Magic Kingdom, Epcot, Animal Kingdom and IOA so far this year and haven't waited more than 30 minutes for any major attraction or coaster with the sole exception of X-Flight.
Dumb luck I guess. That and weekday visits! :)
Back to the topic: Cheetah is a great CCI with next to no wait even on "crowded" days.