JACK-OF-ALL-TRADES
A person who’s good at a bunch of things, but doesn’t have one thing that stands out. They’re like a plate with a bunch of food, no one thing is the best.
She can write, design, and sing, but none of them is the best.
He can paint, cook, and dance, but none of them is the best.
She can fix cars, build decks, and mow lawns, but none of them is the best.