I suspect that it is hard to find real life stories because the miners would like to remain anonymous. If you had a few million dollars in largely untraceable BTC, would you want to publicize your story and make it easy for the government to tax you?
But there's some very strong evidence to indicate that "getting rich" was very possible. One story that comes to mind is "allinvain" who posted a reasonable amount of evidence that 25,000 BTC that he had mined was stolen from him. So, even though allinvain didn't "get rich" in this story, it certainly showed that a solo miner in 2011 could be making tens of thousands of BTC, easily worth millions of USD in 2013.
If you look at the blockchain it is easy to find addresses used by miners in 2010 that have thousands of bitcoins in them. Just find a block reward and trace where it went to. Here is one: 1AvLeBnWbiBeCNHwLGtWEK9GSVug3RWWxt It appears to be an address where the miner collected his block rewards over six weeks or so. (I'll substitute a blockchain.info link when it is back up.) Perhaps this private key was lost, so we can't say for sure. But it's reasonably to think that this one account (worth about $400,000) represents only a few weeks of work for this miner. If he kept all of the BTC he mined in 2010, he is likely a millionaire. At least on paper.
In short, since mining was much less difficult several years ago, and the exchange rate has gone up so much in that same time period, it seems very reasonable to assume at least some of the serious miners from those early days have made a considerable amount of profit.
5Perhaps define rich. – Stephen Gornick – 2013-04-18T22:17:21.470
2Good point. I suppose "rich" starts around being a millionaire, but I'd also be interested in hearing how common it is to make more than $100K USD. – speedplane – 2013-04-19T00:20:54.497
4It's way too late now though. It's awfully hard to make any profit at all mining these days because it's so popular. – David Schwartz – 2013-04-24T00:20:26.547
If everyone reading this put $1000 into bitcoin when this question was asked, we'd all be rich by now. – speedplane – 2017-12-04T23:28:21.400