I agree with Tirod. If you go with the A4 receiver you have a very flexible AR. You can still use a removable carry handle if you like the look or take it off and mount a flip up rear sight like the MBus2 which gives you room on the top rail for a red dot sight or scope. It won't be a true A1 or A2/A3 but with the M16A4 style carry handle it'll do what they do plus allow you to change your mind down the road.
What the OP needs is more than one AR
The OP wants a retro build and that's A1 territory. The used market is flooded with A1 and A2 parts, easy to build a sub $500 rifle. I gave up a long time ago trying to make the AR serve more than one role at a time. It's always a compromise.