Nats need two starting pitchers, including a number 1 / number 2 starter, plus a hitter. If the hitter is a SS or LF doesn't matter, although an hitting OF is usually easier to find. A Schwarber of 2022, whether infielder or outfielder.
Gray is the respectable starter, although Espino has turned into a solid number 4 or 5. Fedde is dangerous and Corbin is hopeless. Cavalli might pitch next year, but Rutledge and Henry are far away...if they ever are to make it.
Go with Escobar, at 35 years old, and hope that Garcia improves.
Incidentally, Gleyber Torres might be out as a Yankee starter. Maybe he will be trade-able as a 2B, although he can't play SS.