Todoroki has been stated to be the strongest in the class by other students before when they moved to the dorms..In the beginning of the series,after watching his fight,Bakugou himself stated he thought he couldn't win against him and that was only his ice side. There has been a special emphasis on Todoroki being the top dog in the class and nothing from Bakugou suggests he surpassed him. In fact, after Deku Todoroki has the most potential to get stronger as fire is %50 his power and should even be more special than his ice and he was top dog even before he started using his fire. Bakugo most certainly hasn't shown anything to suggest he can beat Todoroki but Deku is a wild card in this. He gains massive feats every arc so it's difficult to measure where he stands. The Overhaul arc in particular and Gentle afterwards were combat experience the likes of Todo and especially Kacchan never saw. Besides running away from and avoiding LoV members for a brief time,Bakugou never fought any villains or did something that stands out. We can say that he is slightly above pre-Overhaul Deku and might have improved since then as he told Deku a few chapters ago but it still remains to be seen. Seeing as how not even 1/3 of the manga is finished,it would be pretty unlikely that the "I must surpass him" rival character that is Todoroki to be surpassed yet,and he is also one of the 5 main characters with very high potential. If his fire becomes Endeavor level,that would put him at No.2 level of power(BoS) add the heat regulation his dad lacks and the ice powers he developed since he was a child,Todoroki has the most potential besides Deku of course.
To summarize, Kacchan is overrated,Deku is a wildcard,Todoroki is topdog
By the way, "feats" is completely subjective whereas character statements, narrative focus and actual author statements are more grounded and concrete. A fan measuring an attack to be "city block " means nothing to me. Author stating him to be the strongest in the official databook and stating he would have won but he decided against it because his family issues shouldn't have been solved that quickly pretty much settles it..And other characters acting like he is the strongest is actually solid as well.