It took that guy on the poster for DEVIL RIDER to think of three of the most obvious ones of them all:
38. BEACH PARTY (1963)
39. BEACH BLANKET BINGO (1964)
40. HOW TO STUFF A WILD BIKINI (1965)
...All co-starring the one and only Harvey Lembeck as the one and only....... ERICH VON ZIPPER!!!
Good choices!
43. HELL'S ANGELS ON WHEELS (1968)