Who should i keep in my fantasy football keeper league?

Brees and Jacobs. If you drop Brees and you are only the fourth pick in the first round, there is a good chance that maybe someone ahead of you is in need of a league leading QB. If those people had bad quarterbacks last season then you definitely need to hold onto Brees. If those teams drafting ahead of you did have good quarterbacks last season then you could be alright to drop Brees. So to simplify, if the guys ahead of you have bad quarterbacks, keep Brees and Jacobs. If the guys ahead of you have good quarterbacks, keep Jacobs and Slaton.