Multiple variations of the Steve skin with clothes of the Medic from the game Team Fortress 2 made by Valve.
The coat and the helmet are second-layer and removable in-game.

RED version:
https://www.minecraftskins.com/skin/14316124/red-medic-steve--tf2--improved/

GRN version:
https://www.minecraftskins.com/skin/14316145/grn-medic-steve--tf2--improved/

YLW version:
https://www.minecraftskins.com/skin/14316162/ylw-medic-steve--tf2--improved/

TF Industries (purple) version:
https://www.minecraftskins.com/skin/14316176/tf-industries--purple--medic-steve--tf2--improved/

GRAY version:
https://www.minecraftskins.com/skin/14316183/gray-medic-steve--tf2--improved/

ORG version:
https://www.minecraftskins.com/skin/16747970/org-medic-steve--tf2---new-version-/

Dr. Schadenfreude version:
https://www.minecraftskins.com/skin/14316257/dr--schadenfreude-medic-steve--tf2--improved/

Beta BLU version:
https://www.minecraftskins.com/skin/14316278/beta-blu-medic-steve--tf2--improved/

Beta RED version:
https://www.minecraftskins.com/skin/14316291/beta-red-medic-steve--tf2--improved/

Edit: I fixed the second layer (coat) to not look cut off when walking, crouching or aiming with a bow.