I would suggest the Steinitz (4.e5). You get more consistent positions and if you put the time into studying it, the ideas are easier to understand than the Burn (which is actually WAY more complicated than the Rubinstein) and the McCutchen.
Of course, the other you have to know is the Winawer.
Hello, been trying to play more mainlines against the French. Never liked the exchange or advance as white. So curious what better players think about e4 e6 d4 d5 nc3 nf6 than e5 vs bg5? Been playing bg5 but you’d have to be aware of the burn and maccatchoen. “Spelling”. Curious if there’s any advantage to the immediate e5 vs bg5 as I already like the position after bg5 be7 then e5. How different are the initial e5 and bg5 positions in the classical. For someone trying to improve would anyone recommend one over the other?