I like Sunshine Tots - they're a OSFA and kind of a cross between an AIO & a pocket. It's all one piece but the insert is only sewn in at the top so you can pull it out for faster drying.

I also like Haute one size pockets - they're probably on the smaller side of things for a one size but that means they look a bit trimmer, they're really fast drying and nice and soft. I just stuff them as I take them off the washing line so they're ready to go whenever we need them.