In times of widespread face recognition software this might prove futile ... and raise even more suspicions.
Basically like new identity.
It would help to clean his name for future employees. Also, a really common name would help probably.
"Students, meet your new teacher LeBron James."
Googling "lebron james teacher" shows a few basketball instructional videos, so that's a start. And there are Vancouver articles about LBJ too, so that covers "lebron james vancouver"...