Base Invaders. If you don't go in with others who at least have explosives and decent flying skills, prepare to fail.
There is a really good strategy to taking it on alone. I just drive in with the Entity, sticky bomb each jet then drive in the hangar and park really close to the door of the Cargobob. Fly it back to the airfield, get in Ron's plane to trigger the objective. It will then tell you to steal the Cargobob. Get back in the Cargobob and boom, mission is done. Don't even have to kill anyone. I think this is one of the easiest missions to do solo.
For OP, in my opinion, Judging The Jury is the hardest. Everyone sets a waypoint so everyone goes for the same target. That's OK for the first part of the mission but when the timer starts it turns into sh*t. I've only ever completed it once, I will just back out of the lobby now.