Who are the most notable Entrepreneurs/Indie Hackers, and why?

In your opinion, who is the best entrepreneur in each of these categories:

• currently working
• best of all time
• solopreneur / indie hacker

Consider the following dimensions as you make your case:

• impact
• financial gain
• number of successful projects
• innovation

I'm writing a post on this topic and will include quotes (and a backlink) for anyone who makes a strong argument.