Loudon is a better batsman than Rashid, but isnt this thread about spinners. Even if you want an batting spinner Loudon and Dalrymple dont qualify as they are not spinners of any quality at all.
On that basis I would play Vaughan and KP as the second spinner.
In reality you need to take 3 best spinners we have, with batting ability been important for say the one of them.
'the best performing spinner outside those two at the seasons end'