I don't think you need to pay more for the next two years, but guarantee money beyond that. You can offer more, but I would discount that difference for the contract that would start in two years. in other words take a 4 year add it to the remaining two and average out the salary.
But it is the guarantee that allows a player to exhale.
19 million a year is too much for any non QB. But 70 million guaranteed isn't. I would go ahead and top Von Millers 70 million guarantee and guarantee 75. 6-9-14-16-15-15 something like this, all guaranteed. It would be less average salary but more guaranteed than Miller or any other defensive player. This is me thinking out loud, so there are probably all kinds of holes in this thinking, but just wanted to throw it out there.