Tim Austin had big power. Rafael Marquez stopped Austin, Pastrana, Silence Mabuza, and Too Sharp Johnson at 118. Inoue already deserves it. Hamed had 2 fights at 118.
Outside of heavyweight, p4p I'm not sure any weight division has a top 5 punchers as impressive as bantamweight.
I’m still taking bantamweight for depth: Olivares McGovern Zamora Zarate Jofre + Anaya Becerra Pimental Medel Marquez
No doubt - Zamora could easily be no. 1 but so could Zarate, Olivares, McGovern. All of those guys are all-time great punchers regardless of weight class.
I agree it's very strong, but I think I'd still have MW higher, You have the 5 I already listed then GGG, Fernandez, Hagler, Gibbons, Marshall, Steele, Walker, Fullmer, Tiger, Benn, Eubank ect Then guys like Langford and Sheppard both fought here, even if not prime. Same with Hearns, Jones, Mugabi.
If you're including passing through then you could include Jimmy Wilde at bantamweight among others. I tend to think of fighters who spent a long time at the weight or established their reps there. But it's close with middleweight.