yeah, mirio/lemillion is n.1, but it was said that baku was too aggressive or something so he kept rising a couple ranks to ultimately fall down again; he was at n.15 in the epilogue.
Shoto is n.2, mt.lady is n.3 and then follows deku at n.4 now that we're post-epilogue. Post-epilogue baku is at the n.4 spot.