One of the original 13 GI Joes from 1982, and my personal favorite of that bunch. According to the comics Stalker served in the Vietnam War in the same Long Range Recon Patrol (LRRP) unit as Snake Eyes and Storm Shadow.
Medic, CODENAME: Doc
Doc was the Joe team’s original medic three years before Lifeline would essentially update the character or at least his concept. In the cartoon Doc is most likely remembered for saving Duke’s life after he’s impaled by one of Serpentor’s snake spears. However in the comics he would go on to make the ultimate sacrifice when he was gunned down by SAW Viper.
Heavy Machine Gunner, CODENAME: Road Block
That’s right, kids. In my day Road Block was black. There’s something to be said about a man so built that he can lug around a .50 caliber machine gun. Incidentally when he’s not mowing down snakes the ‘Block is also the Joe’s cook.