User blog comment:KaiserLos24/Champions for Pre-30 Summoners/@comment-8234800-20140312135827

Don't think there's really any champ who has little use for runes and masteries. Some champs scale less strongly with, say, AD or AP, but almost every champ scales with something -  health, CDR, resistances, mana, etc..

That's just how it is on the lanes of Summoner's Rift. If you still want to be able to compete pre-30 on Summoner's Rift, only option you have are champs and roles which rely on your skill and your allies' performance rather than stats. That is, supports and some junglers. You could try Hecarim. He scales most strongly with the damage your allies do.