Don't know
But overthrowing the WG, with Dragon help, and taking down Imu will be A LOT more famous, unprecedented, world breaking, legendary that what Roger did.
Roger legend is HUGE now imagine Luffy's one in centuries. Luffy would change everything. And his crew with him will become legendary too.
Zoro will have his own big fame as the best swordsman and his own legend. But the main one will be associated with Luffy adventure.
So I think Zoro in centuries will be : The mighty nakama of Luffy who was also the WSS of his time and maybe the strongest since then.
So Nakama of Luffy first and WSS second.
But it is the same for Luffy : if Raftel comes before fighting the WG (i think so) Luffy will be PK before taking down Imu/overthrowing the WG. And beating Imu > Pk
So I think in centuries he will be known as the saviour of the world, the god killer etc a little above his PK title.
Same for Sanji and All Blue : if Sanji discovers All blue he will be extremely famous but his association with Luffy taking down the WG will be greater. Same for Nami and her world map, Chopper healing everything etc.