Survey on the best players of all time

Hey everyone,

I'm going to be producing a survey on the best players of all time. I'm still piecing things together, but the main idea will be: An alien arrives and a 12-game match will decide the fate of earth.

Below is my list of candidates. Are there any potentials I'm leaving out? 

The list is alphabetical by first name.

Borislav Ivanov is a no brainer.We're talking the fate of the earth here..

I've always been a huge fan of Lajos Portisch one of the best hungarian players ridiculously solid probably more so than Karpov. Also Kasparov played one of his immortals against him.

Perhaps you can also include Wei Yi.

How come the 1495-1800 period doesn't get a single nomination? Three hundred years must have produced someone good.

same lol