I think after OL and before your 1, 2 & 3 listing's, DT/NT and a big Kam/KE45-like safety, CB or DB to round-out MM's D-scheme of 75% nickel/3 safety sets would jack this defense up.
Also a KJ like OLB would plug another hole.
Hopefully the #18 fixation of Loveland, McMillan, Shiny Objects...