riddle - You may know me - Who am I?

Though I am just a man,
You may be quite a fan.
You may think I cannot die,
You may have seen my taxi fly.

Later I saved everyone,
I'll make you cry, even the sun.
Then suddenly I was dead,
Don't let that get to your head.

I took some time, went back and forth,
Found great strength, and great worth.

Thought I could settle down,
That didn't work, just made me frown.

I have many well known friends,
They think we can be thrown away, in the end.
Figure now who I may be,
And where you often see me.

Answer

The answer is:

Bruce Willis

Though I am just a man, You may be quite a fan. You may think I cannot die, [Die Hard] You may have seen my taxi fly. [The Fifth Element]

Later I saved everyone, I'll make you cry, even the sun. [Tears of the Sun] Then suddenly I was dead, [The Sixth Sense] Don't let that get to your head.

I took some time, went back and forth, [Looper] Found great strength, and great worth. Thought I could settle down, [RED] That didn't work, just made me frown.

I have many well known friends, They think we can be thrown away, in the end. [The Expendables] Figure now who I may be, And where you often see me.

Thank you for all the remarks that suggested improvements/corrections. Much obliged. Also. Nicely crafted puzzle.