I agree with you. I like Littleton as well, but given their young depth and just the relative ease of replacing ILBs they will only go so high for him.
Personally, I think they most likely have to allow Fowler and Peters to walk. Assuming both have good 2019 seasons they could end up netting 3rd round comp picks for both. Or a 3rd and 4th. And those comp picks are part of how they can remain competitive for years to come.
I think Brockers will be in a similar situation to Saffold. Going into his 9th season he may be looking for his last payday in the NFL. He can remain in LA at a lower rate or go elsewhere to get more.
I would let the players above go in order to be able to keep Johnson and Kupp. Just my opinion....