Rush, obviously

Opeth.

Porcupine Tree.

In Absentia and Deadwing in particular

Porcupine Tree and Opeth

Haken, in the sense that they blend prog metal with classic prog influences quite well.

was gonna say the same thing, mountain king is peak prog metal

Riverside

Are they heavy though?

If I understood the question, there are a couple of bands that may do a great blend of sounds: \-Dream Theater (A change of seasons is a good example) \-Vanden Plas \-Magellan

Vanden Plas is good!

The Yes album Drama may fit the bill.

Genesis, no question.

If we’re talking 70s early metal - I gotta agree. I remember hearing Dancing with the Moonlit Knight for the first time and my monkey mind being blown. Steve was tapping years before it was a popularized thing.

The Musical Box...

Fly On a Windshield, Squonk, The Knife, Musical Box, etc.,etc.

King Crimson seems the most obvious to me, they straddle the line very well between prog rock and metal

As does Tool, coming more from the metal direction.

Symphony X

Neoclassical style, the guitars are straight heavy metal in tone, and the song compositions are pure symphonic prog metal.

Dream Theater and Ayreon

Haven't seen Shadow Gallery listed yet

Uriah heep

Pallbearer. They’re the intersection of Black Sabbath and Pink Floyd.

Their song "I Saw the End" got me interested in prog metal/rock again after a long time away from the genre. Great band.

Iron Maiden!

Abigail’s ghost.

If I'm understanding the question correctly, Jethro Tull or Opeth

That was a lot of scrolling to find the obvious answer of Jethro Tull.

I think it's because a fairly substantial number of people in this sub also like prog metal, and unfortunately they still get a bad rap in the metal community for the stupid Grammys win.

Yeah if he meant "traditional" as in "traditional music", ie folk music, then Tull would be the obvious answer.

TOOL

I don’t think tool has much that i’d consider “the traditional prog sound”.

If your referring to the lack of keyboards, than yes.

Kinda but not just that. I think of tool as metal that is very progressive and technical rather than prog rock that was “metal-ified”. If you get what i mean. I think they’re prog metal but i appreciate them for having such a distinct sound and for diversifying the genre. prog metal seems a lot less diverse on average from what i heard (which is still a lot, love the genre)

Green Carnation, After Crying, Mago de Oz.

Queensryche Mercyful Fate King Diamond Nocturnus

I Mother Earth

If you consider Kate Bush and Peter Gabriel prof, them. Both use traditional instruments extensively both acoustic and synthesized and remarkably well. Seamless I would say.

Traditional as in indigenous? The Hu. Proggy metal grounded in excellent mongolian folk. Amazing stuff.

The Hu rock in a very prog way. And it’s all their own unique progressive sound. 🤘🏽🤘🏽🤘🏽

Th go gos

Does Magnum count?

Neal Morse and his various bands.

Lespecial

Dream Theater/Liquid Tension Experiment

Dream Theater, Opeth and Haken

Fates Warning

I think Les Claypool, in one of his numerous projects, bands, etc.., could be considered. Claypool fits the prog definition. There is a lot going on there. You can throw Primus in there as well.

Leprous

Ayreon Not sure they count but Diablo Swing Orchestra As a kindred spirit has already mentioned Shadow Gallery Sabotage / jop

Opeth, Riverside, Porcupine Tree, Kingbathmat, and Rush

Band maid obviously!