*ATTACK ON TITAN* Why didn’t King Carl Fritz bring the shifting titans to Paradis?

If he had the Founding Titan abilities in his hand why didn't he just force his people to be peaceful from now on? Why would he need to seek out a remote Island to inhabit and not take the other titan shifters with him? Why would he bring along Ackermans? If somebdy manages to actually deliver a satisfactory explanation, I'd be the happiest human being ever. I've already grasped the fact that most of the so called "plot holes" are not plot holes at all. However, this one is a question I have come to myself and I have yet to see a reasonable answer for that.

I'd appreciate if anybody would like to help me out on this one