I don't think it really makes any difference what aircraft the west supplies. What Ukraine would relly need is a strike package capable of supressing the Russian Air defence, if they can't do this then whatever aircraft is supplied is going to find itself in a very dangerous enviroment that will limit its utility.
I really don't think NATO wil be willing to supply the EW assests that would be needed to accomplish the AD surpression mission.
It's no secret that the way the west would be fighting this would be to take out the AD and then drop precision weapons on anything of importance once the air has been secured.