All of the above are good, you will get different recommendations for 'the best' from different people. Funny thing about the AR, you can spend a shit-ton of money on an AR-15 and have it not perform much better than a $1000 model. Most of the good names are rock solid, this technology has been around for a long time after all. Anything from the above list is good, I have a WELL used 17 year old Olympic Arms ( considered a cheaper manufacturer ) that runs perfect on any ammo with good grouping with all original parts. YMMV
My personal recommendation? DPMS