Pretty sure everyone who has a high level character would be considered rich in Skyrim. Gold is very easy to make, especially if you try!
I am up to 170,000 gold coins and I haven't even tried to make gold via crafting. I just sell loot I get from dungeons.
Rich Nords? Well those disgusting noble men in solitude
There are sleazebags like this one: http://www.uesp.net/wiki/Skyrim:Erikur
And then there are nice and generous ones like this one: http://www.uesp.net/wiki/Skyrim:Bolli
And then there are are those that are rich, intelligent, powerful, and benevolent like this one: http://i.imgur.com/YCSkP7y.jpg?1
I wish there were more options to give gold to beggars, more than just 1 coin anyway. If I can afford to give 500 coins to my kids whenever they ask, I think I can at least afford 500 for a poor beggar.