If you were stuck on a desert island, and could only have one other person stuck there with you (real, historic or fictional), who would it be?

And... a variation on your variation.

If you could take one year off your allotted life expectancy, and give it to another person (real, historic or fictional), with the idea of making the world a better place for the maximum number of people, to whom would you give it? And would you do it?

Hint: My choice died in 1791 at the age of 34...

tanstaafl.