Absolutely, the Carafa "Special" line of malts (aka German "debittered" huskless chocolate malts) are the only way to roll in this style. (Ok, not true.. you can also use a beer colorant called Sinamar which is basically made from Carafa)
As for Oak, sure why the hell not, although it would be better to use oak cubes than oak chips. Keep a close eye on it thought to avoid possibly overloading things along 3 fronts - hops, oak, and "coffee"