After 3 years of playing, I've still never won lane against these two champs.
and 
Not saying they're OP, but GOD, they can get out of control if you don't strangle them from the get-go.
and 
Not saying they're OP, but GOD, they can get out of control if you don't strangle them from the get-go.

pssst
cho gath
I once won lane against Nasus as Vlad so hard, Nasus only got 2 CS per minute. The Nasus in question was really bad ofc, but still.
you're welcome >3>
I find that extremely hard to believe. You honestly must be really bad. I've seen A SHIT TON of horrid Riven players. Like, 0-15. I find it highly unlikely that you have never played against one of these players, unless of course you are the 0-15 player. Also, you obviously don't have the interest in trying to learn how to counter them, because it isn't that hard. Probably the only time I'll say this to someone, but "get guud".
Stop trying to get circle jerk upvotes.
I find that extremely hard to believe. You honestly must be really bad. I've seen A SHIT TON of horrid Riven players. Like, 0-15. I find it highly unlikely that you have never played against one of these players, unless of course you are the 0-15 player. Also, you obviously don't have the interest in trying to learn how to counter them, because it isn't that hard. Probably the only time I'll say this to someone, but "get guud".
Stop trying to get circle jerk upvotes.
Didn't mean to strike a nerve with my post, but it should be noted that during the time of "Yasuo 2 OP, Thresh 2 OP, Vayne 2 OP, Akali 2 OP" I was steamrolling them.
So, to each their own.
I'm sure you have your own champs that you hate fighting that I can take out in my sleep.
Nasus always loses laning phase lol wut
You are saying they're OP, and they're easy to counter if you do some reading.
Not sure about op, but I have tried every single supposed counter to nasus and have lost lane to him with all of them. I'm not sure if I have beaten him in lane, but I do lose lane almost every time I lane against him
Nasus in an infinite stacking tank, what do you expect? And Riven is easy, just play Darius/Garen.
Easy.
For
take
For
take 
Works for me anyway.