A quick Google of vegan athletes brought up quite a list. You could go that route.
But here's the thing. Is your husband an elite athlete with serious athletic goals? Is he thus seriously examining every single other thing he eats to create the ultimate physique for his sport?
The protein packing is largely a function of the food supplement industry. Actually, a friend of mine who has written a book exploding the protein mythology worked for 7 years in the food supplement industry and eventually left the field partially because he could see how the dollar was driving the supplement world. Same with the "several protein shakes and bars" over the course of the day. Who stands to gain? Not the farmer's market.
Another search brought up a "Vegan bodybuilding and fitness" site. If your husband is seriously interested in finding out about this, apparently there are plenty of resources!
In addition - there are no doubt references on the PCRM site, as there were a couple of elite athletes involved in the 21-day kickstart we did there in March and January.
Sorry to hear it has become a family harmony issue. Hopefully the burden has not all fallen upon your shoulders
AND I'm betting that others right here in McD. will come by and contribute!