Harold is pretty bomb, IMO, but you may miss the damage. He does not alway require his ability to win, at any note.
With Oxen banned I'd say he is your best bet (I know Rubie has high damage and SOA, but it does not change the fact that you need to pump in a lot of pills to get that damage in).
Just remember that Wendel requires courage to even have SOA (which pretty much forces you to play him during one of two turns unless you plan to toss him as fodder) and Gail Ld requires confidence to raise her damage output to a respectable (for a 2*) 4 which means she ties in well with the Freaks once they win, I guess.
In short, use Harold instead of Rubie, play around with both Gail Ld and Wendel and then decide.