A long time ago, Alpha learned that one cannot exist on v-neck tee shirts alone. Although he has tried, you need other options. Aaron Marino of alpha m. discusses the casual, fitted, button-up, short sleeve shirt.
In regard to casual button-up shirts, pay attention to the length, which should land in zone 2 or 3. You can wear it out or tucked in. You need one in black and one in white. You can add a fun color or pattern for a third one. Stay away from shirts with crazy details on the shoulders or patches.