in regards to the everyone will die part and everything you do means squat, i often think about both of these things. i know a solution and it is possible to have it all. actually, the solution explains my fascination with achilles and thetis:
i think that that is something that i would really want, to be remembered until the end of recoreded history, maybe longer if possible. but on the one hand what price do you pay for that? socrates was executed. i can't say for sure, but did people like newton and einstein have a wife and family? maybe you don't have to die young to be glorious, but it seams you have to give up something: a family, friends, good health, etc.
when i think about the first part of what you said i'm also reminded of one of shakespeare's more famous soliloquys:
it really makes you wonder, what if i could become the greatest person to ever live and was remembered forever? then you look at the big picture and realize how long recorded history stretches back, then how long man has existed, then how long organisms have lived on this planet. then how old the universe is. in reality all of mankind's triumphs and tribulations will be less than a blink in the eye of god, a small dot on the timeline of eternity, since i don't see the universe ending anytime in the next forever. It's this high level of nihilism the main characters of shakespeare's tragedies are known for. And the question remains, what does any of it mean if we are (mankind) only going to exist for an infinitely small amount of time in the grand scheme of things.
I guess a positive humble person would say that life is about the ride, not the destination. That you have to enjoy it while you can, I would say they are right, but you can't simply dismiss the fact that after you die will be remembered by next to no one and in a small amount of time compared to how long history has been recorded you will be completely forgotten.