When thinking about all our successful sides, I think the common theme is that we have always had a real presence in central defence whether it is the big, robust defender or the smarter, faster type. All of them could also pop up and contribute a goal or two as well.
Just to name a few we have had Bradley, Vyner, Hartley, Nelson, Wotton, Coughlan, Marker, Morrison etc. The common attribute with them has generally been leadership, a win at all costs attitude, getting stuck in or pace (Vyner and Nelson)
I think the question is do any of the current crop have that in them to join the group above ? My guess is that Edwards has it in him potentially and he is certainly a brave lad, not sure about the others.