I agree for the most part on these rankings, with a little input for a few of those guys.
Britton and Ogando as 1 and 2, I can take that, but Narveson deserves some credit his way too. Guy is filthy, and unlike Britton is in no danger of losing his job. I would maybe put Harrison above everyone here, he is playing lights out. Chris Young has had some injuries and is losing velocity on his fastball, but the guy is 6'10" and has one of the most decieving deliveries in the league. Injury prone, yes, but I would mind taking a chance on him. The one I would have the least trust in on this list is Ogando, and I dont think he's going to keep that flawless ERA much past this weekend.
I would rank these differently, Putting Freese and Gomes up top. Freese scares me a little because of the 2 recent surgeries on his feet, but is putting up the best numbers at the moment. I dont know how people arent putting more trust into Gomes. Guy hit 20 HR in 280 AB 2 yrs ago and has already hit 3 this yr, and if you use last years numbers as indicators, Ill take 80-20-85-0-.250 off the WW any day of the week. I am assuming you're talking about David Murphy at your #5, and I just dont buy it. I have followed this guy for yrs and I just dont think he will ever get past his consistent 3 yr avg of 420 AB, 60-15-65-7-.275. Even if he gets more AB, which I dont think is going to happen, I dont think his ceiling is any higher than that, and would rather have Gomes/Freese/Smoak ahead of him.