What I like is the regular fit’s moderate hemline, which stays put during activity.
Vtg 90s Mens XL Thrashed Thermal Ribbed Knit Long Sleeve Henley T-Shirt Green
You will find that the green doesn’t clash with other colors you wear.
J Crew Oarsman Heritage Brushed Rib Knit Henley Base Layer Shirt Navy Sz XL
A nice feature is the regular fit’s ability to pair with any bottom in your closet.
H&M Regular Fit Ribbed Polo Shirt Size Medium
You will find that a solid T-shirt like this one is a wardrobe workhorse.
Boss By Hugo Boss Men Black Tee Shirt Front Pocket Logo Ribbed Cuff & Collar XL
A nice touch is the black contrast stitching on the sleeves.