(If you want to recommend me something, PLEASE DO :3:3)

Scorpio: Flowey

Sagittarius: Frisk

Capricorn: Asgore

Leo: Papyrus

Aquarius: Monster Kid

Picses: Napstablook (Awww :3)

Aries: Undyne

Cancer: Toriel

Gemini: Sans

Virgo: Alphys

Libra: Mettaton

Taurus: Asriel

(I didn't put Chara anywhere xD)