There are a lot of different seat that can be put in. The only question would be in the area of will it mount to the stock YJ seat bracket. Personnally, I would get racing seats for the front w/ 4-point belts.
I put mazda 626 seats in mine. However I had to cut the driver side bracket down about an inch and weld it together. And I just welded the seat frame to the yj bracket. I paid 50 bucks for 2 seats. driver is reclining. lumbar support, and a couple of other things that I don't use. But 50 bucks and 3 hours labour [my own] you can't beat that and way more comfortable than yj seats.