One Of My Favorite Rileys

My Prefix can be a line

But I am more known as a kind of formation

My Infix is a very great waterfall

Tourists usually take picture of it

A great channel my Suffix is

It may just be one of the best

My whole is a very famous person

Note :

Title is also a hint

Hint :

Hint 2 :

EDIT : A specific number can be related to this Riley Riddle

Hint 3 :

The specific number is 7

Hint 4 :

The name of the waterfall consists of just 3 letters

• First thing to come to mind for the infix: Rot13(Avntnen Snyyf $\to$ AS)? – Mr Pie Sep 7 '18 at 11:22
• Nope not that one :D @user477343 – Kevin L Sep 7 '18 at 13:04
• "A great channel my Suffix is" is that referenced to Yoda from "Star wars"? – NoOorZ24 Sep 17 '18 at 13:38
• @NoOorZ24 Hmm, it could be :) – Kevin L Sep 18 '18 at 2:39
• Not as famous, but could the infix be about ROT13(Qvrgna Snyyf)? – Cubemaster Sep 18 '18 at 11:52

Could you be :

Rowling? (Thanks to @El-Guest for suggesting I drop the "J.K.")

My Prefix can be a line

A Row is generally a line

But I am more known as a kind of formation

People row boats in formation?

My Infix is a very great waterfall

The Wli Falls(in Ghana)

Tourists usually take pictures of it

It is a popular waterfall to take pictures of

A great channel my Suffix is

National Geographic (NG)

It might just be one of the best

Sure, if you enjoy nature.

My whole is a very famous person

(J.K.) Rowling, very famous for her Harry Potter books

Note :

Title is also a hint

Hint :

J.K. Rowling has won many an award for her books.

Hint 2 :

EDIT : A specific number can be related to this Riley Riddle

Hint 3 :

The specific number is 7

Seven Harry Potter books

• Dang this was a solid answer, especially with the row - line/formation thing – El-Guest Sep 18 '18 at 13:58
• Yeah... I was really convinced of this one – Cubemaster Sep 18 '18 at 14:00
• Very super close yet quite far at the same time (Not the precise answer) :) – Kevin L Sep 19 '18 at 2:25
• @KevinL Could it be just the last name, with prefix r13(ebj)? That’s a line and formation... – El-Guest Sep 20 '18 at 14:58
• @El-Guest Oh, I didn't even think about that – Cubemaster Sep 20 '18 at 15:11

Partial:

Is the waterfall Victoria Falls? which would imply the infix/middle name of the person is Vic/Victoria

• Nope, that's not the one I had in mind – Kevin L Sep 14 '18 at 7:50

Not so much a "Partial Answer" as a "guess based on your note"

The title is a hint

That points me in the direction of

"My Favorite Things"

from

The Sound of Music

To be honest, I didn't even try the actual riddle; but I think I might have at least solved the hint.

• hmm, I think that's still not it though :D – Kevin L Sep 17 '18 at 2:28
• I didn't think it was the answer, but am I on the right track with the hint? – ThePuzzlingPlatypus Sep 17 '18 at 17:12
• Well, it does relate to my favorite things but it's definitely not about music :D – Kevin L Sep 18 '18 at 2:41

Might it be

CHOW LING

Prefix

not sure about the line but CHO formartion is for Chief Happiness Officer

Infix

thank to @Cubemaster WLI The Wli Falls(in Ghana)

Suffix

NG national geographic

• Close but still wrong :D – Kevin L Sep 19 '18 at 2:23

Since I think the answer @Cubemaster provided is correct, I'm not going to repeat it, but I think I know how his answer might relate to the title.

In the Goblet of Fire, Harry Potter encounters a Sphinx in the maze which asks him a Riley Riddle. Is that one of your favorite Riley Riddles @Kevin ?

• Nope not that :D – Kevin L Sep 21 '18 at 2:32
• I just meant that I like (Answer)'s books very much – Kevin L Sep 21 '18 at 2:42