I'm not sure what "...sound like Elvis films" are supposed to mean. Titles that sound like Elvis songs? Films that sound like the films Elvis did himself?
If the latter, then DADDY-O (1958) would qualify, John Williams' first feature film assignment in the industry. In fact, it's very much an Elvis-style film wherein they try to sell off the now forgotten crooner/rock singer/Elvis Lite singer Dick Contino -- who randomly and with regular intervals enters a stage to throw off a tune or two during the movie. Gotta have maximum spin-off effect, mind you, screw the story or quality otherwise! (the same could be said of most of Elvis' own films as well, of course).