I'd say that Commoner's idea sounds the most like a Sakrohm big, though I think the stats might be a little different.
My bet would be a 9/6 with -2 Opp Power and Damage, Min 3
With this, the card would be defensive not only in the sense of it having DR, but it would also be able to outpill most cards. Also, only having 6 damage makes it so that 2 HKOs are possible with the other 6 damage cards Sakrohm has, as long as you can dodge DR. This way, it's a very strong card, but still fits in with the clan and doesn't just blow away the competition like Enigma