Welcome to the forum!
33" wheels and tires can fit without a lift but if you want to improve the stance too, I'd recommend installing a mini lift or leveling kit. They aren't expensive and help give the jeep the look you are imagining in your head.
33" wheels and tires without lift or level (rubbed slight when suspension was full flexed or compressed) :
33" with level:
More pics: 15" MB72 fits JK
Also with a 2.5" mini lift it is possible to run a 35" tire. (3" lift is ideal)