I like the Uniqlo heattech and airism but they are tight & tiny. I went up to an XL because of my chest and I don't think they offer any larger sizes

I've bought some very cute stuff from Sierra Trading post over the years, all sorts of sizes. I really like their prices on merino wool travel stuff- mostly Icebreaker brand but not all - no smell, quick(ish) drying - better than cotton but not as good as manmade. I have some Columbia shirts and some North Face (more the button down options than t-shirt options though)

In addition to Sierra Trading Post, check out REI sales & esp REIoutlet.com.

In the past couple years, there has been a great deal more variety in terms of wicking/technical fabric clothing that doesn't look like gym clothing - I appreciate the options!