That list is surprisingly deceptive.
There are entire sets available you may or may not have that will never be on that list just because they are technically paladin/death knight sets, but they're complete sets nonetheless and I understand its easier to leave them out but its not a complete set list by far.
I'm talking about the paladin and death knight set from Firelands, for example. The death knight's a warrior will never have the shoulders for, but the paladin's is completely available.