Stan is not an alien. He is a human

Well considering he must be at least 180 years old, is able to follow members of the Avengers and Gaurdians actually across the galaxy and has the skill to infiltrate different organisations and is allied with the Watchers. Sounds alien to me.

Sounds more like the creator. (of MARVEL UNIVERSE I mean)

And he would technically count as an alien

I got a score of 20/20. Try to beat my score!

I got a score of 19/20. Try to beat my score!

21/20 cooper 🙃

I got a score of 16/20.

I got a score of 20/20. Try to beat my score!

18/20