maersk E class: 80 MW on one propeller, 80 per propeller
nimitz class: 194 MW on 4 propellers, 48,5 per propeller
apart from the difference in running speed, here you see why the sizes are completely different.
I would suggest an propeller like the maersk E's the size of that of the nimitz. that would get you on 40+ MW per propeller, if you ship is similar in size to an nimitz that would mean you got an speed of about 28 knots. if you want to go faster, an nimitz sized powerplant and the propellers that belong to it would make sense.
the sideview diameter of the propellers tells me a lot more if they fit, btw, from the stern you can make everything you want look good or bad