Star Trek: Starfleet Academy teaser has some nice call outs in it.
First: Benjamin Sisko!
Then: Admiral Harry Kim. Our boy did get promoted after all!
Then: It looks like Tawny Newsome changed careers late in life from actor to Starfleet officer as she attained the rank of Admiral.
And finally, these that I spotted that are familiar, there are lots that I missed:
Beckett Mariner (can’t see rank)
Someone with last name Roddenberry (cut off in the left column)
Captain Demora Sulu
Commander Christine Chapel
Lieutenant Tasha Yar
Ambassador Spock
Lieutenant, Junior Grade Wesley Crusher
Lieutenant Nog
Admiral Leonard H. McCoy
Captain Montgomery Scott
Lieutenant Tom Paris
Captain William T. Riker
Lieutenant Commander Hoshi Sato
Commander Deanna Tori
Lieutenant Commander Data
Lieutenant Julian Bashir
Admiral Katrina Cornwall
Captain Seven of Nine