I don’t know if anyone else has suggested this but I think General Warfield from StarCraft should added, & considering his part in the campaign story he should be a Tank.
Warfield will always hold a special place in my heart. He was such a cool and reasonable character in the campaign, and it broke my heart when he was killed off in Heart of the Swarm.
I made a concept for him as a main tank that can switch to ranged slowing AA’s based on the Marauder with a charge system, if you are interested.
Link can be found here: [HC] Warfield, General of the Dominion - #3 by Bliztron-1378
This is my bruiser build for him. I felt pretty awesome about the concept I came up with. Please take a look: