Keeper LB

I am in a keeper league and with Dansby getting hurt and Burfict being a HUGE disappointment and hurt as well, I want to pickup a young LB to keep for next year and would like advice on which one to pickup off waivers. I would need to drop somebody and was thinking Burfict.

Avery Williamson (1st choice)
Brandon Marshall
Preston Brown (2nd choice)
Nigel Bradham

My other IDP players are

Mario Williams
Demarcus Ware
Chandler Jones

James Laurinatis
Navorro Bowman
Vontaze Burfict
Karlos Dansby
Keenan Robinson
Jerome Harrison

Jonathon Cyprien
Rashad Jones

Avery seems like the best bet, Brown would be my #2 as well, he'll most likely stay with Kiko but Avery is the safer option to keep starting next year and keep the role he has now.