For guys I don't know, since I'm not into that stuff. If I have to pick some, Ban, Mael (Estarossa should be included, but his goofy faces and his odd proportions in the anime take him points) and Hendrickson (both when he was younger and his current self) would be my picks.
For girls, picking five in no determinate order:
•Melascula (perfect mix of creepy, cute and sexy, I don't care if she's a snake) •Matrona (a muscular beauty with a pretty face, me like) •Gelda (sexy vampire girls are always welcomed) •Ludoret (who would have imagined Ludociel personality would made Margaret so hot) •Nerobasta (the very poster girl of THICC in the series)
2) Gowther (doll- idk why... it's just like that)
2)Mael (Maybe even Estarossa- without his shit eatin' grin tho)
2)Gloxy da RaInBoW wInG fAiRy
2)Yeapp- Rosy without that shit eatin' grin
2)Meliodas (Leader of the TC)
Human girls best, goddess girls not good, demon girls seemingly good at s*x only, vampire girls good at blowjob, giant girls good at.............? Fairies cute but too small, girls like Merlin are asexual so....