Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Communication Breakdown
Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Ground Equipment Issue
Airport; Human Factors; Procedure
ZZZ1 to ZZZ; Aircraft X received maintenance at FBO. A major concern arose during pushback; the ramp is very congested with large business jets directly across FBO's hangar. While pushing back; I realized our left wing was well over an Aircraft Y. The Tug Driver responded it was OK; they had a Wing Walker. I insisted we stop the push and not place our wing over other aircraft. Ahead and to the left was Aircraft Z clearing US Customs. To avoid this we were pulled ahead and far to the right of the taxiway centerline; then the tug disconnected. I refused to taxi out until Aircraft Z was moved as it would have passed well under the bottom 1/3 of my side window. Eventually after nearly an hour a tug moved Aircraft Z and we departed for ZZZ. Suggestions - Move other aircraft as to not encroach the footprint of Aircraft A aircraft prior to push and start.
Air carrier Captain reported a conflict of safety with ground crew movement to safely avoid other aircraft.