You know, there is no right way to put together your resume . . . there are industry standards; if you deviate too far from there, just know that is sending a message, and make sure you know that a message is being sent.
If your resume is light, you may need need to fill in the resume with other experience, theater or not.
Remember, a resume is sort of a two-dimensional representation of yourself, and your resume should reflect your yourself. Now, that isn't an excuse to make it go wacky and silly. But, you are the sum of your experience, make sure you are accurately reflecting that experience so you can get the interview.
Remember, the resume is the hook to get the interview, the interview is the hook to get the job.