I wouldn't worry too much about "selling" out, deary. Everyone sells-out to some degree, regardless of profession. Even someone like a Stephen Sondheim has to make conessions to the market.
I'd focus on finding work as an actor. Every sensible actor realizes at some point that if someone is willing to pay you to perform...you take it!
The more you work, the more money and recognition you have.. the more money and recognition you have..the more choices you get in selecting what you will and won't do.
But if you start off with the "this is beneath me attitude," you may miss out on that tampon commercial that would have paid you big bucks and allowed you do that rinky dink play you love so much.
What great ones do the less will prattle of