Excellent, First-rate, First-class, Marvelous, Wonderful, Magnificent, Outstanding, Superlative, Formidable, Virtuoso, Masterly, Expert, Champion, Consummate, Skillful, Adept, Prominent, Celebrated, Renowned, Eminent, Famous, High-profile, Important, Prestigious, Notable, Well-known, Superb, Brilliant, Great, Terrific, Super, Tremendous, Top-notch, Crack, Ace, A1, Mean, Awesome, Fantastic, Sensational, Fabulous, Fab, Fancy-pants, Blue-ribbon, Blue-chip, Top-drawer, Wicked, Expert, Master, Genius, Virtuoso, Maestro, Adept, Past master, Champion, Star, Demon, Ace, Wizard, Pro, Whiz, Maven, Crackerjack

(Noun : Someone who is dazzlingly skilled in any field)