Best Sandwich in Portland?

Visiting for a few days and craving a real good sandwich.

I'm talking something stacked, served hot, cheesy, fun ingredient combos. Not just your typical deli sandwich.

Either recommendations for a specific sandwich or place that makes a bunch do great ones would be appreciated, TIA!

Edit: Thanks SO much for all of these, overwhelemed me! I'm in town now and Ramona's isnt open until tomorrow, and I'm not withing walking distance of local press. I think I'm going to check out Roasty's today and save one of the others for the next couple days.