There's a DOGE rich list at this link, but it says it's reindexing the blockchain and the results shown might not be accurate. However it shows the top address D8EyEfuNsfQ3root9R3ac54mMcLmoNBW6q has 17,850,000,230 DOGE which is about 17% of the total supply. It must be an exchanges address though, I can't imagine anyone having so many apart from an exchange.

https://coinplorer.com/DOGE/Addresses/0/Top