My two current favourites are:
-John Rusin. I'm an anatomy geek and he's the only guy right now throwing out shit like that. Used to be you had guys like Eric Cressey and Mike Robertson doing articles about the rotator cuff and shit like that, which I loved, but these days Dr. Rusin's taken over from them.
-Paul Carter. The only unashamed bodybuilding content, currently. I also really like his writing style.
There's a lot of authors whose articles I used to read that I don't really bother with now. It's not because there's anything wrong with the content, just that it's not really a message that resonates with me. Take Dan John for example - the dude's awesome and I love how he writes, but after the 400th article saying all you need to do is squat, deadlift, overhead press and farmer's walk, I'm just a bit over it.
I'm not so into the new school of authors either, to be honest. I don't even know names but I've glanced at articles telling me things like "dumbbell bench with your ass off a bench" for some reason, or "do lateral raises holding the dumbbell at the top for awesome shoulder and grip gainz." I mean, maybe, I guess, but it just seems like an inefficient way to do tried and tested exercises that've stood the test of time and don't really need to be improved. As much as I love this site, it's honestly quite surprising to me that they'd pay authors to put out filler like that.
Could I get in on that? I'll happily write an article saying you should do dumbbell curls with a resistance band connecting your wrist to the support of a squat rack. You'll blast the biceps while strengthening your core and rotator cuff, bromosexuals. Pay me money now please.