Gen 1
Misty(Gym leader)
Lorelei(Elite four)
Lance(Elite four)
Blue(Rival+Champion+Professor's son)

Gen 2
Ariana(Team rocket admin, Even Giovanni recognizes the superiority of gingers)
Silver(Rival)
Lance(Elevated to champion)

Gen 3
Maxie(Team magma leader)
Flannery(Gym leader)
OG Shelly(Team Aqua admin)
Sydney(Elite four member)

Gen 4
Mars(Team Galactic Admin)
Ronald Mcdonald(Elite four)
Buck(Stat trainer)

Gen 5
Chili(Gym leader)
Skyla(Gym leader)
Alder(Champion)
Benga(Champs son)

Gen 6
The Majority of team Flare(Indicating that Gingers on average are rich as fuck)

Gen 7
Zossie(Alien... I think haven't played ultra sun or moon)

Gen 8
Sonia(Pokemon Professor)
Milo(Gym leader)
Include the hisui characters here that are ginger here.

Gen 9
Mela(Team star "admin")

If I included pink hair as "red" then the list would likely be twice as long. Anyways say something nice to your ginger superiors.