Replacing Bowman

I've taken a serious hit to my LB core with Bowman going down. When I look out the LB ranking, everything is pointing to Brandon Marshall, but when I take a look at the fantasy points leader at the LB position, Zac Brown is the far and away leader in the league & available. Even others who are ranked better than Brown but not a good at Marshall ( Deion Jones, Mark Barron, Zach Orr). Am I looking at Zach Brown having a breakout season and take the gamble or should I take the safer route and go with one of the other options like Brandon Marshall or Deion Jones?

Brown is good, drafted him myself, when hes been healthy hes been a good producer, I would take Brown since hes a good spot then Marshall would be #2

Is Wilhoite a must add in a tackle heavy deep LB league?

I wouldn't say must add, he is worth it tho, I got his last time bowman went down and he started out and flamed out fast, gamble but one that could pay off