I love "If Ever Would I Leave You" from "Camelot"
I also think that "It's Too Darn Hot" is really 'hot' if staged correctly
R & H really had a gift for producing scenes with this 'romantic chemistry': "Some Enchanted Evening" from "South Pacific" sticks out, as does "Younger Than Springtime" and "We Kiss in a Shadow" from "The King and I". Though it's not in the stage version, the song "Something Good" from "The Sound of Music" and even the scene where they dance together.
I also think "If I Loved You" has this feature.
Other modern examples: I agree with "As Long as You're Mine" and I know I'll be executed for saying this, but "A Dangerous Game" from "Jekyll and Hyde" oozes with sensuality, as does "Alive". (the orchestrations in "Alive" really do it.)
Also-"Only Love" from "The Scarlet Pimpernel" (cut from later version.)
"A birdcage I plan to hang. I'll get to that someday. A birdcage for a bird who flew away...Around the world."
"Life is a cabaret old chum, only a cabaret old chum, and I love a cabaret!"-RIP Natasha Richardson-I was honored to have witnessed her performance as Sally Bowles.