I tried Clive,Elvis,Spyke,Roger,Lola Noel, Melanie and Miho.
Not a good berzerk player but got 120 pts from 9 fight ( 3 loss)
I've been using them for a while and I don't recommend using them in mono. I've previously used a Berserk/Junks deck that got me 5th a few weeks ago which consisted of Melanie, Spyke, Lola, Graven, Gil, Rowdy, Flanagan and Tremorh. They are definitely playable.