Chris Pratt as Han Solo in solo Han Solo movie (pun so very much intended)
If it must be done the, yes, Pratt would be the best candidate.
Chris Pratt should be in every movie. As every character. And even some of the props.
For instance, we could have a remake of Titanic where Chris Pratt is Jack, Rose, every other passenger, the Titanic, the iceberg, and the Atlantic Ocean.
How about a time traveling Harrison Ford from the 80's.