There are many breeds that can still herd. The thing is that not all are bred for that now. You could get two of any herding breed one from show and one from a working farm and one will herd one wont. Thats the truth with any of them.
So its not what breeds can still work, its what breeders are breeding for the true standards of the dogs so they CAN work.
I have seen samoyeds, acds,kelpies, shelties, rotties, borders, old english, beardies, swedish valhunds, malinois, shepherds, belgians, collies, and alot of the other herding breeds herd and work. but I have also seen dogs of ALL these breeds that showed no talent for herding at ALL.
So it all comes down to the breeding and lines of the dogs, not the breeds themselves. This is true with anything not just herding but nay purpose of breeds. Theres gonna be some that can and some that cant. So when you get the breed you want research lots, find there purpose, and find a GREAT breeder who sticks to that. Also from a WORKING farm is better than just competing.