I take guys I want a round early and do not worry about it. Especially if I do not like ADP appropriate players as much. Then, even if I am wrong, I have a team of guys I like. I do not go crazy unless I am at a turn position, but 1 round early is not too much. Especially with the guys around there. It is not too hard to make pro/con for all of them depending on your personal leanings.
FWIW - Carson (who I completely believe in) is going earlier than expected in many drafts. Fournette is likely closer to ADP. I do not think there is a problem with Fournette 3rd and Carson 4th just to get them. Plus, I like the WRs in the 5th and beyond way better than most of the RBs. If I have three RBs going into the 5th, the runway is clear to gobble up all those WRs you want.