2019 coordinator(s)

[grampahol]

I really don't expect Marvin to get the hook in 2019 not because he's done a great job ,but because Ol Mikey won't do it  so that leaves us with potentially two coordinator positions open.  I can see them retaining Lazor, but defensive coordinator is going to be wide open unless Marvin decides to keep both jobs for himself which I think is unlikely .
So....who would you want as our next defensive coordinator assuming Marvin remains as the HC and decides that both jobs is just too much?