Accounting for age, track record, and tools, it's something like Soto, Guerrero, Ohtani, and Olson. Soto was destroying MLB pitching when Guerrero was destroying AA or struggling in the big leagues. And Trout stands above them all when healthy.
Guerrero still has the most raw hitting talent of all those players, including Trout. His absolute ceiling is basically Stanton + Cabrera on steroids.