The Greek goddess Aphrodite was intended to be this as the goddess of love and beauty, and naturally, the literal personification of Fanservice. However, she suffers heavily from The Worf Effect. Aphrodite's Roman counterpart Venus was the personification of beauty, and is often depicted as naked in artwork, including Sandro Botticelli's famous "Birth of Venus"◊.
Atalanta is a sexy huntress who took an oath of virginity and refused to marry. Neither of these vows lasted, with many myths pointing out she had two sons from two different relationships and marrying the man who beat her in a foot race. There is even an ancient piece of artwork depicting her in the Ancient Greek equivalent of a bikini.
The nymphs were a whole race made of this trope. They were depicted as eternally youthful and nubile maidens who completely embraced their sexuality in contrast to the chaste wives and daughters of civilized society. There is a good reason why many heroes took them as wives and many gods also had them as occasional lovers, and where the word "nymphomaniac" originated from.
Astarte in an extremely popular Canaanite goddess.
Adam and Eve are the only characters from The Bible which were depicted nude or almost-nude in art even during the most prude periods of history, because even the most prudish Christians can deny neither their importance in Christian canon nor the importance of nudity for their characterization.
The bride of Song of Solomon (also known as Song of Songs) serves as this role for her groom, and their relationships are depicted as pure and consummate. The Nipple and Dimed trope is also played straight in the song.
Although in Hebrew folklore and an alternate reading of the bible story, Eve was only God's second choice. His first created wife for Adam, Lilith, had too much of a mind of her own and was too upfront sexual. God is said to have reassigned her to Satan as the Ur-Example succubus, wiped Adam's mind clean with Brain Bleach, and had a think as to what he could do with a spare rib. Lilith is still around, as a demoness of untramelled sexuality.