I'm wondering whether this is even possible in 2020 (or 2021, etc) when you have almost no captial to hire people, and you are working on your start-up all by yourself, and maybe you have a product that you've worked on for a while with maybe some (none-paying) users each month - what are some good examples of one-man team like this that got into YC or have gotten seed-funded (not through crazy personal connections)?
For the record my ex co-founder and I were invited to a YC interview back in 2018. We didn't get in but we did manage to secure funding here and there. The start-up died some months ago.
Now I'm founding a new start-up alone and am extremely curious about sole founders who have managed to found a successful startup without captial. Thanks!
Your question seems to be searching for such an answer as the Indie Hackers forum, touted as founders (some solo, some groups) building profitable internet businesses.
You've admitted that you have no close friends who can be cofounders (ie. you're a loner), that you have no staff, and no paying customers.
Investors see all of those as red flags. They like multiple founders for many reasons, including social proof and free labor. The only thing you have going is presumably a working app, which does give you some initial credibility. They also expect a large-enough market, over $10 billion.
If you are in the social media space you will also need whatever the minimum subscriber base is today, around 5-10 million users to get funding.
Instead of chasing VCs with a bad story, you're better off finishing the next point release and devoting your time and energy to sales and marketing. And make some friends, ffs.
If you want to read sole-founder lore, then Marcus Friend (POF), Pierre Omidyar (eBay) and patio11 (hmm) are worth reading.
There are many examples of successful single-person startups (forgetting a recent example of a person who ran SaaS product single-handedly for over 4 years and then expanded). However, you can only bootstrap like that. To grow bigger, eventually will have to hire people - which means money, which means either VC or customer - which means tonnes of work in building products/building relationship/shipping product etc. I guess, if startup success rate was 1% then solo-founder startup success rate must be 0.01%.