Many of the projected early versions of what became the Me 262 had engines mounted centrally in the wings rather than under slung. I don't think the fuselage was an option given the need for two engines, given the size of WW2 fighters generally, and a requirement for the armament to be in or close to the fuselage.
The early engines were so short lived and unreliable that having them fitted under the wings, almost as a modular power egg arrangement, may have been a significant operational bonus.
Cheers
Steve