The benchmark for quality T-Shirts is Pistol Lake which sadly went out of business. I have been searching for alternatives that match up in terms of fit, quality, and feel. This MFA thread on t-shirt brands explores some alternatives.

Alternatives I’ve tried - Cuts Pima cotton version is soft and comfortable, cut is a bit strange (longer and rounder), AO curve version feels plasticky and is not comfortable (returned) - Fresh Clean Threads cheaper, tighter cut, do not see durable (shrink more easily)