Short-ish skinny trellis needs short-ish well behaved vine
I have a iron trellis that stands 6 feet tall, 2 feet wide that I've been moving around my yard, trying to find the right combination of place and plant. I'm sure you all can relate! Right now it's in the back of a northwest facing bed and I'm looking for a vine that flowers well but will not go crazy. Last year I had a cardinal climber on it and that thing looked like the Swamp Monster from the Deep. Beautiful abundant foliage and almost no flowers whatsoever.
I thought of clematis, of course, but am not sure this will be the final resting place for the trellis. Thus the thought of an annual. Is there a MG that stays under 6 or 7 feet? The bed is narrow otherwise I would consider a potted mandevilla but I hate to take up the room with a large pot.
Any help will be gratefully received!