Who Would YOu Put as a Fifth Member of the Big 4 of Prog, Making Big 5?
 

The Big 4 Bands of Prog are Pink Floyd, King Crimson, Genesis, and Yes. Believe it or not, that's the common and official decisiuon from fans and the media, such as the big four of thrash metal is Metallica, Megadeth, Anthrax and Slayer, and the big four of grunge is Nirvana, Pearl Jam, Alice in Chains and Soundgarden. All official. But if you could add a fifth member and make it Big 5, who?

For me, it would be Kansas. I feel their albums are very underrated, and they've contributed a lot to the progressive rock fanbase and to hard rock in general. I love most of their 70's albums, including their live album Two for the Show. They've had a lot of nearly perfect works.

PLEASE NO REPLACING ANY ONE MEMBER.

First, I would remove Pink Floyd because they're a psychedelic band. Duh.

I would then replace them with Rush.

Then I would put Soft Machine just because of their awesomeness. I can't say much in the way of influence.

Yeah, away with Pink Floyd.

Mine would be:
King Crimson
Genesis
Yes
Van der Graaf Generator
Gentle Giant

Gentle Giant
Yes
Jethro Tull
Emerson, Lake & Palmer
King Crimson

Then lots and lots of great acts. I love Pink Floyd but not really prog IMO.

The prog big 4's kinda been already decided by the populace...

Source? I've only heard The Big Four applied as a term to thrash metal. Google searches don't seem to help your case either.

Off the top of my head without thinking hard.

YES
GENESIS
KING CRIMSON
ELP
GENTLE GIANT

Sorry, dude, but Pink Floyd's not in it.
It's usually King Crimson, ELP, Yes and Genesis.

I'm not much up on prog but I like Pauls Jethro Tull pick and if at all possible i'd insert Mars Volta as a default.

Second (third?) wave though.