@lieutenant-admirable replied to your post

It’s Maedhros.  His name literally means “the sexy one”. 

WELL Maedhros is a strong candidate, but then we also the following…

Fefe: “For Fëanor was made the mightiest in all parts of body and mind: in valour, in endurance, in beauty, in understanding,” etc etc.

So he was like the prettiest of all elves ever? Ok Mr Tolkien, gotcha.

Finarfin: ‘Was said to be the fairest and wisest of Finwë’s sons”

Soooo actually the blonde one was the prettiest?

Galadriel: “A sister they had, Galadriel, most beautiful of all the house of Finwë”

So actually it was Finarfin’s kid? MAKE UP YOUR MIND SIR

Then we also have Celegorm The Fair, though the meaning behind that is very much down to interpretation but I’d still consider him a candidate.

All in all Tolkien is probably like “they’re all pretty goddmanit don’t make me choose”