Another one I completely forgot about was Firehawk at Kings Island. It wasn't until we were booking our trip that I even remembered that it was there, and I only remembered that it was there because I read it online when we were buying Fast Lane Plus. To our surprise it turned out to be one of our favorite coasters in the park.
I feel like a lot of good coaster get out shined, or over shadowed by new, taller, faster coasters.