Fry bacon, until done; turn heat down to low. Remove bacon and cover.
Place Hawaiian rolls underside down in pan for several seconds until golden brown; remove.
Make cheese by combining cream cheese, pepperjack and feta until smooth. Cover and refrigerate until ready to make the sandwich.
Combine flour, salt and pepper. Combine onions in flour mixture, dip in egg, then toss in flour mixture again.
Preheat oil to 350 degrees and fry onion strings until golden brown. Drain on paper towels.
Preheat grill for at least 10-15 minutes.
Sprinkle chicken breasts with salt and pepper, brush with olive oil and place on prepared grill with pineapple slices.
Turn after 5 minutes and brush with Stubbs BBQ Sauce, turn again after 5-7 minutes (don't turn if there's no grill marks on the bottom!), and brush with Stubbs sauce.
Grill for another 5 minutes and remove.
Make sandwich by layering bottom bun, whipped cheese, chicken, bacon, more sauce, pineapple and onion strings, repeat.