You want to be more well rounded? Here's what I suggest.

Ask yourself, "what have I done in my professional career that sets me apart from every other clone who flies the line, has a degree, clean record, blue suit, etc etc etc..." "What have I done to improve my company or the industry?"

My suggestions:

Airlines LOVE safety. Ever consider volunteering with your ALPA (or union) safety committee? ASAP, FOQA, Fatigue, Accident Investigation, etc.

Next, airlines LOVE training. CPT instructor? Ground school instructor? Help revise manuals or build CBT modules? Sim instructor?

Not interested? Ok how about other volunteer positions within your company?
Critical Incident Response? Pro Standards? Assistant Chief Pilot? ATC coordinator? HIMS volunteer?

Ok more hardcore union stuff, but still shows you're willing to go above and beyond just flying the line: CA/FO rep? Grievance/Scheduling/Hotel/Training/etc committee?

There are plenty of ways to show that you care about your company, the industry, and your fellow pilots. You don't have to go save cats or build houses for the poor to stand out. Just show that you have the willingness and ability to do something a little extra for your profession.

My $.02.