Definitely can be a number 1 defender IMO but as Dannnn mentioned a couple of pages back we tend to prefer a setup where our defenders defend space and whoever comes into that space. Lever is perfect in that setup.As good as Lever is, can he play as a number 1 defender?
Seems to be the 3rd at Adelaide behind Talia and Hartigan.
Someone like May fits the bill better.
Not that height is that much of an indicator but he does have a couple of cm's on May, just needs to bulk up a bit.