An independent inventor develops the first faster-than-light drive to take humanity to the stars, usurping a solar system of greedy corporations and vengeful governments.

Bingo.

Hi Hallucigenia,

Here's how I understood the story so far based on your loglines:

A man invents a faster-than-light vehicle to transport humans to the stars and becomes a commercial threat to the government-supported corporation that wants him out no matter how.

I hope this helps
Good Luck