You can do both. The choice before you isn't like getting married.

Fly the corporate gig while you are simultaneously sending out applications to other places.

You're looking for waves to surf at the same time you are looking for the Big Kahuna.

Corporate may lead to a regional and a regional may lead to a major.

The best job you'll ever have is the one you have right now. As long as it leads you to where you are going.