Fautanu is one of my favorites in this draft. I love his physical play! TE Bowers is too but Fautanu has such a great skillset inside that he's a very safe pick, and the way he projects on the outside is a real strongpoint for selecting him too. I hope he's there at #21IMO neither OL or DL are such big needs that we "must" draft one over the other. In my perfect (realistic) draft, Fautanu falls to #21. He's a perfect fit that could play G immediately and replace Armstead in a year. But I would say he's a 50/50 chance to be there at our pick. I also really like Barton and would be fine with him at 21. He could play G immediately and has the position flexibility to play T or C.
But outside of those two, I would probably take a DL player over any other lower OL prospect. And while Fautanu is my top choice, there are several DL which I have on the same tier as Barton. While my personal preference would be to take Barton amongst that group, I see it as perfectly reasonable for someone to prefer Latu or Byron Murphy or a few others.
I don't really love the WR options there, although I would be fine with Leggette and a couple of others in a trade down. I have WR as a need as well so it's not about having OL or DL as bigger needs. Rather it's about whom I see likely to be available at different points in the draft.
I also see S as a need, but there's no way S would be a consideration at 21.
The bottom line is that I expect 21 to be about BPA amongst our need positions and also considering positional value. To me that suggests that if our first pick is is at 21 it will most likely to be OL or DL and anybody claiming that one or the other is absolutely right or wrong is just being a drama queen.