We have a surplus of tall forwards, I suggest play Finlayson on a wing where he could assist in the ruck and take uncontested marks (he can't be a defender).Im in the same boat as you, but he was clearly one of our main trade targets in a position we are lacking. For that reason alone id have him pencilled in with Mead the one who makes way.
I agree with your assessment on Finlayson and would have him ahead of Lord and Esava for the third tall/relieving ruck role.