I am a traveler.
In birth, I had struggles, but shifted a tad to become a double saint,
Based, to be honest, on what I could do with a bit of paint.
I'm proud to say that I became unbeatable there,
although I had to drop one loss because of some wear.
My next stop was spectacular - cloud nine!
In my 7 there I had 2 - quite fine!
I was missing something there, though,
So I moved on to a place where I'd get in the flow.
The thing I was missing, I got not once, but twice!
It felt good, though it came with a price.
I returned to the place that was missing one thing
And brought it back with me, now the king.
I told you, I'm a traveler.
There's one more major stop in my long journey
to a lake in the midst of the angels.
That's where I am now, but that's not where I'll stay.
I am a traveler, and I'll always be that way.
What is my name?
The accepted answer should include accurate explanations for each line in addition to the final answer, including the title, which contains two indirect hints.
Note: (that kind of provides a hint)
In this poem, the term "traveler" can be taken in alternative sense to the one intended. Applying "traveler" in that way to the subject of the riddle is vaguely humorous, but not really correct, and I'm not trying to say anything in that direction.