Depending on how much you know about rangers, I'll rewrite BLK02's advice.
3" bodylift - easy install, very affordable. Rangers are lucky in that the bodylift looks pretty natural (once you cover the inside fender gaps) unlike chevys which you really see the frame with one.
Torsion bar keys - ehh..I don't know much about them but I wouldn't waste my time personally.
4" Superlift - Very common. Costs 1500 I think. Sometimes deals can be found for it though. Drops the your front suspension 4 inches as well as your torsion bars (the bar on the front end that goes back. Some people go an extra step and convert it to "coilover suspension" for about 800 dollars I think.
5" RCD kit - pretty much the benefit here was it was a coilover kit and sometimes they get sold. They are good kits except coilover springs do wear out so they might need replaced.
All in all, if you're going for looks, best option is a body lift + new wheels and tires.