I enjoyed Wastelands of Time, Victoria Potter, Shezza's Denarian Renegade, The Prince of Slytherin by TheSinisterMan, A Cadmean Victory by DarknessEnthroned, They Shook Hands by Dethyrl, and Defiance by The BlackStaff and NightMarE. I also kind of enjoyed Harry Potter and the International Triwizard Tournament, although the Harry/OC was annoying. I recently read From Ruin by GraeFoxx and C'est la vie by cywscross, and found them entertaining enough.
I will admit I am a bit of a sucker for WBWL and Slytherin Harry.

 

Also, I have read and enjoyed Harry Potter in the Claw of the Raven by Bakeandeggs and Sarcasm & Slytherin by sunmoonandstars.

 

Apologies for the low effort, but the stories in this C2 are pretty good.

https://m.fanfiction.net/community/DLP-5-Starred-and-Featured-Authors/131518/99/2/1/0/0/0/0/

 

Thx much. Any good Ravenclaw!Harry of the top of your head?

 

Harry Potter and the Boy Who Lived is technically a Ravenclaw Harry, though he transfers during the Christmas break.

Also, An Unfound Door by Joe6991, author of Wastelands.
Edit:
And this is my hundredth post! Took me long enough!

 

"Hallowed" by Shinysavage is excellent, and I also remember "Harry Potter And The Arcana" being decent. Firefox has crashed three times while attempting to paste links now, though, so you'll have to find them yourself.

 

https://www.fanfiction.net/s/11762850/1/Harry-Potter-and-the-Accidental-Horcrux and it's sequel which you can find on the author's profile

In this Harry is basically a Ravenclaw in Slytherin.