I am also a root beer fan. In the past a big A&W fan, but only at the old school A&W drive ups. Those truly were the days. One of the last places....I was told that actually brew their A&W Root Beer in California was in Oakhurst near Bass Lake. Their brew was truly amazing and creamy. Since then all is really lost when it comes to getting a "draft out of the spout" other than the occasional beer brewery that does some root beer too. Those are usually real fun. For me, as far as over the counter root beer, Virgil's is at the top, then it just becomes a matter of taste and availability where you are. Mrs. Stewarts is good, Barque's is good. Henry Weinhardt's is good. There are a lot of small batch brewers Like Death Valley Brewing.....But I think if you really want to try what I think Root Beer was originally supposed to taste like...Try Virgil's
https://www.virgils.com/