>Like a Waagh Banner
Nah, that is probably one that can be nobz only. It'd be a bit extreme on boyz.
Forgeworld units have higher variance though. Most of it is fine, but the problems are even bigger. IA8 Orks are fine though.
On the off-chance you're not a master ruseman, I'd like to point out that (1) it's space fantasy, (2) that alien techno-barbarians fit in sci-fi anyhow and (3) there are some amazing ork sculpts out there, the vast majority of ugly ork sculpts being the ones that predate the Tau entirely. If anything (4) the Orks are defining of 40k, and were they ever not to fit, it would be an entirely new product - (5) something that can not be said about the Tau (although I think that their inclusion enriches 40k as a representation of more traditional sci-fi). So in closing (Lotz) Orks are propa 40k. Dealwithit.gif