crownplaza Barney Barton to round out the Hawkeye trio, literally any of the (newer) West Coast Avengers or Young Avengers. Clint doesn't really want to babysit but Kate and Loki need America friends. All friends.
Additionally, rounding out the MCU crew with a Steve Rogers, Carol Danvers, Wanda Maximoff, etc would be nice.
We also only need a Ben Hanscom and Mike Hanlon to finish out the Losers Club, for something completely not Marvel.