Generally a good list. I haven't seen "Napoleoncita," so I'll have to take your word for it. (People should also remember that only the unrated version of "Love Crimes" has the excellent spanking of Sean Young by Patrick Bergin.)
I was surprised by your inclusion of "Vagabond King," which has never particularly impressed me. In its place, I would nominate either "Public Deb No. 1" or "Dos Pistolas Gemelas."
"PDN1" is very dated, dealing with the Communist upsurge of the 1930's. Brenda Joyce, best known for playing a truly scrumptious Jane in a number of Tarzan movies, is a Communist-sypmathising soup heiress, and George Murphy plays a red-blooded, 100% American waiter in a Russian restaurant. She gets him fired and he responds by turning her over and applying his hand to her delectable bottom.
"DPG" is a Spanish film from the early 1960's, starring Mili and Pili, two identical twins dressed in wildly inappropriate but fetching identical costumes, as two sisters trying to run a ranch in the Old West. One is a total brat, while the other is sweet-natured, and they are being courted by two neighboring gentlemen. The brat picks a fight with her own suitor and ends up under his arm with her tight pants absorbing a much-deserved spanking. After he leaves, her sister's gentleman pays a call and -- not having learned her lesson, of course -- the brat picks a fight with him too. As she ducks around a corner, however, her angelic sister happens to throw some waste water in the caller's face. Can you guess the rest? I suppose it's a shame that the innocent one got her britches warmed up, but the girls were both delectable -- and their pants were tight.