Suppose under the relative calm of Rafa we had 5 in that position plus Dummett:

Clarke
Fernández
Lascelles
Schär
Lejeune

After The Pieman took over, he got Rid of Lejeune, which often left us short on numbers - playing the likes of Kraft & Hayden out of position etc. so 5 seems about right (plus Dummett again):

Fernández
Lascelles
Schär
Burn
Botman