We all know that Ravenclaw depicts wisdom. However three wise people in the stories (Albus Dumbledore, Minerva McGonagall and Hermione Granger) have come from Gryffindor. Thus, it makes me wonder if there was anyone mentioned in the stories who actually belonged to Ravenclaw and was as wise as them?
You have to remember a very important factor of the house sorting which is often overlooked - you aren't put in a house just because of your natural talents. A lot of it has to do with how you regard the specific traits associated with each house.
Hermione for example is easily smart enough to be put in Ravenclaw, but in the very first book we see what she thinks of Gryffindor's traits:
"Me!" said Hermione. "Books! And cleverness! There are more important things – friendship and bravery ...
Hermione sees bravery as being more important than intelligence, so she fit into Gryffindor. Likewise we have the example of Peter Pettigrew, who was to all intents and purposes a coward - but looked up to people with strength. He didn't fit the Gryffindor mantra whatsoever.
I can imagine a lot of Ravenclaws simply appreciate intelligence and strive to be their best, whether or not they have a natural talent for it. Whereas some of the smartest people in the books - such as Dumbledore and McGonagall, as you've mentioned - simply value other things.
Now, to answer your question - there's a handy list of known Ravenclaws at the Harry Potter wiki. Probably the most notable one here would be Olivander - he's well-known in the UK at least as being the best wandmaker around, and we know that wandlore is an extremely complex branch of magic. That must surely show a very high level of intelligence - he's a theoretical physicist of the magical world.