I don't know much about birds, but I hear you on the wasp problem. I go around in March/April with a tennis racket killing the queen wasps flying around in my garden. It's best to have at them before they start building nests. I encourage nectar bees, but wasps kill and roll up caterpillars so they are counterproductive in having a butterfly garden.
I do know that Orioles are attracted to orange, so put the jelly on an orange plastic plate in the open so they can see it while flying overhead. Or use an orange feeder designed for Orioles. If you don't like wasps perhaps keep the jelly away from the walking path or not too close to the house would be a good idea.