Difficult choice... hard to find optimal solution. Although this last icon you posted looks really good to me. Only problem is where to put the shield...
I guess, if you put the shield completely by the side... I mean next to the profile and ribbon so that it actually doesn't cover anything, that wouldn't be good solution since icon would be too large? Besides it probably would look funny... Basically it always comes down to choosing between two proposals you posted in #321.
You are right Wojtek, MiG-15 really has a large vertical tail... Maybe some other type of aircraft could be considered? MiG-21? It too has quite a large tail but its considerably longer, so it might look better...