In terms of nostalgia and such, Typhlosion has been my favorite fire Pokemon. My main reason for this is that Silver was the first game I really got in to (I kept getting stuck on Yellow with all of the caves), and I gave him great movesets. (Especially since Earthquake was OPed in the first few games)
Yet with a powerful fire type move and Earthquake, my Typhlosion felt indestructible.
Moltres, i dont really like its design or anyhting (but to me is the best of the three legendary birds) But i think in a super HD realistic pokemon game that watching this pokemon flap its wings as it flew over head would look incredible <3