There are a number of private hedge funds that consistently beat the market, but none of them have the history that Berkshire does. Although they are actual hedge funds whereas Berkshire is essentially a holding company.
Most hedge funds make their money out of the fees they take out from clients money. In fact most of the administrators of mutual funds make money from fees too, and the more trading they do, the more fees get shaved off. Investing is a form of gambling where only the house wins.
If you really want to "invest" plough money into your own business or into land. If you look at the richest people in the world - apart from Buffett, who is a one-off, they all made their money from business or land-owning.
Given the global "depression", one really interesting example is Joseph Kennedy. He made his initial money as a stock broker, but that was when insider trading was legal, and he got lots of inside tips. If you tried that now, you'd go to jail. But here's the interesting thing: he famously sold early but in 1929 he was worth "just" £4 million (that is, his gains all crystallised before the stock market crash, so at it's very height). But by 1935 he was worth $180 million. So he's minting it in the middle of the great depression.
It was down to a) having money to pick up bargains when no-one else had a dime and b) investing that money into real estate and real businesses (he bought a bankrupt chain of movie theatres at a time when going to the movies was the opium of the masses). Interestingly, he didn't plough his money back into the stock market - he moved onto to real things (probably his goal all along).
The moral of the story is that the only people who make money out of stocks are those who do it short-term and cash in, and arn't tempted to gamble again and lose their money, but divert it instead into acquiring real assets and businesses.
If you keep just doing stocks, over the long-run you lose, just like most gamblers in casinos do. Part of it is down to lack of information - if you actually own a business, you have all the information about it at your finger-tips and can influence it's direction. If you are buying listed stocks, you only know what they deign to tell you 'cause they are forced to by law, and you have zero influence over the direction of the company.