to analyze where Colin ranks right now, you have to remember the greats who came before him. Jim Ryun certainly must still rank ahead of him, breaking 4 as a junior and getting third at the Olympic trials that summer. He then ran 3:55 as a senior to break the world record. That's tough to beat as far as GOAT high school status.
Other contenders include
Alan Webb, 3:53 high school mile. Hobbs Kessler, 3:57 indoor mile record and running faster than the collegiate 1500 record outdoors with 3:34.
Galen Rupp, 13:37 high school 5k record
Lukas Verzbicas, 8:29 2 mile.
Imo Sahlman has not matched any of these accomplishments yet, but he still has an outdoor season to go and stands a chance to.