Eh Villain wise Oro > Pein imo...And I don't like Oro. But he did what he did because he could and was bored. No other reason. Nothing to really gain by destroying Konoha at all. Pein's reason for blowing up Konoha doesn't make him as great. And the only reason in was in Konoha to begin with was for Madara. Plus Pein killing Jiraiya just isn't as well as Oro killing Saru because of Pein's emotionless state.