I have: various reusable spaceplane launchers, the N1, for big stuff that doesn't fit in cargo bays, the N4 (4 times as big as the N1), for huge stuff that doesn't fit in cargo bays, and the N9 (9 times as big as the N1), for obscenely huge stuff that also doesn't fit in cargo bays. The N1, N4, and N9 use a reusable liquid core made of Kerbodyne parts, and disposable solid boosters. The number of boosters varies based on the payload, but at launch the rockets usually derive about half their thrust from the core and half from the boosters.