I personally don't think that characters that will change or remove files without the user's consent should really count as "characters". I feel like at some point a line gets crossed and it's just malware (especially the "Dragon Tier" stuff that's more about gratuitously breaking your computer rather than simply defeating the in-game opponent). But, like what was said by the user above, it's up to the individual's taste.

As for JUS Scp 173, try something with OP reversals to beat it, such as Omega 61 or 2nd Death Star.

Also, even though I'm sure these characters are way outclassed, I'd like to mention that Geirolul, Hyper Kung Fu Man G, and My Ancient Crab (12p) have very good offense on 1.0+, as they can K.O. some characters that most 1.0+ characters struggle with (Genjitsu, A-Bomb MK2, Devil's Eye 12p, etc.) However, the cheapest in that arena that I've seen is Gunvolt+ (11p), which is a private betting site exclusive for 1.1 that can beat most characters before the round starts.