Look at your planform edge alignment and the semi-curvature of the forward, blended fuselage, very good. Now look at the new J-36, really no planform edge alignment. The J-36 design is more than likely optimized for aero efficiency related to a high speed, theater medium strike platform, hinting at some sort of LO capability, the J-36 is definitely not a fighter. Your NGAD could be optimize as a longer range, supercruising LO interceptor which I know is similar to one of the LM concepts. Please lighten the color and add more details (flight surfaces, weapons bay, etc). Wish I had 3D modeling ability, I'm just a systems/subsystems guy.