Regarding the receiver vs running back early debate.
I employ what I'd call "RB Lite". It's not quite RB zero but has a similar premise.
What I do is this, the first two rounds I go RB/WR or WR/RB, depending on where I'm at in draft order and the best player available.
Then I follow with receiver/receiver in the 3rd and 4th (in leagues that start 3 receivers, if not I go either WR/RB or RB/WR).
Then I normally take one of Kelce, Olsen or Bennett or a QB in the 5th or 6th.
Which leaves me with late round backs such as Crowell, Ivory, Tre Mason & Doug Martin all of who I am fine with pairing with my early round RB1.
I also like rookies like Duke Johnson, David Johnson, David Cobb as well.
The reason I prefer securing my receivers early is because I believe consistent receivers are far more scarce on the wire. Last year the wire produced Odell Beckham Jr, Brandon Lafell, Mohamed Sanu, and Martavis Bryant (and in the leagues he wasn't drafted in, Jordan Matthews) whereas the wire produced running backs like CJ Anderson/Ronnie Hillman, Justin Forsett, Isaiah Crowell, Tre Mason, Matt Asiata, LeGarrette Blount/Jonas Gray, and Denard Robinson.
And in years past, this disparity in positional scarcity between receivers and running backs was even more pronounced because there was no transcendent talent like Odell Beckham Jr just falling from the sky mid-season.
Fantasy football players seem to suffer from recency bias and many have a hard time keeping scope of history beyond one or two seasons.
Fact is, running backs go down at a higher clip than receivers. Backfields also tend to be more fluid situations as some depth chart competitions run from the pre-season right into the regular season.
Yes running backs generally score more than receivers, yes having a 3 down back with no competition is great, having multiple 3 down backs is fantastic.
At what cost though? I'd rather anchor my team with two top-flight receivers who will likely remain healthy and have a vice grip on their job all year.
Yes do some receivers get hurt? Absolutely, but running backs go down at a higher rate, it's just the nature of their position.
Again if you're in a 2RB/2WR/Flex league, there's nothing wrong with going RB/RB/WR/WR or RB/WR/RBWR, it's probably the best course of action (I myself prefer RB/WR/WR/RB, especially with Gurley going in the 4th round). However in 2RB/3WR no flex leagues I believe wholeheartedly that loading up on high-end receivers is the way to go.
This graph illustrates my point.
I say go mock, try it. See how you like your team at end. Generally my strategy requires taking a QB late so you'll be passing on guys like Rodgers, Luck, Peyton, Wilson, Big Ben, and Brees. I generally pass on Cam (though I take him when he slips), Romo & Ryan as well as my strategy requires one being disciplined enough to address the skill-positions first.
I'm a believer in value QB's like Eli (though his ADP is rising), Tannehill, Rivers & Stafford and sometimes pair 2 of those 4 together. Pairing one of those guys with an upside come-back player type pick like Bradford, Kaepernick, Cutler & RG3 is an option as well.
So there you go, that's my RB-lite strategy and my take on receiver vs running back early.