Personally I would go with several ARs to pass around, and 1 each of a variety of weapons to cover the gaps in range.
For example, I have 2 match-grade long-range bolt action high powered rifles for accurate long range shooting, an AR-15 for higher rate of rife short to medium range scenarios, and a 12 gauge for short-range. Those are all set up for me.
My plan in the near future is to build an AR-10, another standard AR-15, and an AR-15 chambered in .458 SOCOM. Those 3 rifles will be for family and friends, and I've identified who I'm building each one for, so they will have the opportunity to take them to the range, sight them in, and get accustomed to them.
I specifically chose the AR platform because they are easy to use, accurate, reliable, and everyone I expect to be around if the S hits the F is already familiar with them. YMMV.