Since you need a 100% scholarship, consider the three wealthiest boarding schools (Phillips Academy at Andover, Phillips Exeter Acadmy, & St. Paul’s School in Concord, New Hampshire).
You need a standardized test score–SAT.
Based on your success at judo, you may want to try prep school wrestling. If so inclined, the two best in the US are Wyoming Seminary in Pennsylvania (about one-third are boarding students and Blair Academy in New Jersey.) At Wyoming Seminary, you will certainly meet several world class athletes in wrestling. Same should be true for Blair.