I recommend reading here:
In general based on what you have said, I’d look for a full suspension with 120mm front and 100-120mm in the rear. You’ll want a modern XC bike with head tube angle under 69 degrees. You’re in the market for what’s referred to as “down country” XC bike, which actually that is where the trend is going for 2021 XC models. There are lots of good bike choices at the moment so you’re in luck.
A few weeks ago I was just riding trails near you; Fountainhead, Lake Fairfax, Rosaryville State Park and W&OD. I had my Scott Spark RC 900, which could be an option for you as well, but I’d wait to see what their 2021 model looks like.