Lucas Arts - P&C Adventure games, X-Wing/TIE Fighter series, Dark Forces/Jedi Knight FPS series
Interplay (including Black Isle) - Bard's Tale, Wasteland, Fallout 1/2, Planescape: Torment, Icewind Dale
MicroProse - Sid Meier's Pirates/Civilization, Flight sims
Sierra - P&C Adventure games
Blizzard - Lost Vikings, Blackthorne, Warcraft 1-3, Diablo 1/2, Starcraft

List of devs isn't in order

-1- Bioware

DA:O
ME2
ME3
DA2

-2- Naughty Dog

TLOU
UC2
UC3
UC
Crash Bandicoot

-3- Rockstar

RDR
GTA5
GTA
GTA4
GTA: Vice City

-4- Bethesda

Skryim
Oblivion

-5- CD Projekt Red

Witcher 2
The Witcher

1. Valve:
Half-Life
Half-Life 2 + Episodes 1 & 2
Left 4 Dead 1 & 2
Counterstrike (one of the only multi-player games I've played consistently for over a year)
Portal
Portal 2

2. Bioware
Dragon Age: Origins
Mass Effect 1-3
Knights of the Old Republic
Neverwinter Nights
Baldurs Gate

3. Ubisoft Montreal
Assassins Creed series
Far Cry 3
Prince of Persia
Splinter Cell
Rainbow Six: Vegas 2

4. Bethesda:
Morrowind
Oblivion
Fallout 3
Skyrim
and all their expansions!

5. Naughty Dog:
Uncharted 1-3
The Last of Us

Media Molecule
-Tearaway
-LBP franchise

Falcom
-Ys

Bioware
-Dragon Age franchise

Altus
-Persona

CD-Project
-Witcher series

Also lots of indies

You Atlus people are good people :3

By the way I need to play Etrian Odyssey. Does anybody have any opinions on it?

It's an pretty good dungeon crawler! You need to like those though to enjyo Etrian Odyssey. The story is minimal and you will spend most of your time exploring dungeons and fighting enemies. It's quite hard but once you get the hang of it gets manageable. It's very old-school, but the recent changes they made make it a more accessible experience.

I will post only the developers, I like most of the games they released so that's a good enough reason.

Konami
Nintendo EAD
Atlus
Capcom
Namco Bandai

This should be fun xD Keep in mind I'm only listing games that I have played and beaten from each developer to make this as unbiased as possible. 

#1 Bioware

• Mass Effect series (that's all it needs to be my #1)

#2 Naughty Dog

• The Last of Us
• Uncharted series
• Jak and Daxter
• Crash Bandicoot

#3 Bethesda

• Skyrim
• Fallout 3

#4 Bungie

• Halo

#5 HAL Laboratory

• Super Smash Bros series
• Kirby

Oh man this is tough leaving out so many great developers... Shouts out to Insomniac, Rockstar, Rocksteady, and Irrational Games, 

Ive never really played a dungeon crawler to be honest.  How is the story?

The story as I said, is minmal so don't expect to have a story to pull you through the game! There is no story at all, it's just a group of adventurers trying to get to the bottom of the maze. It emphatizes on the atmosphere and makes you feel like you are on a real adventure.

A dungeon crawler would be the old SMT games or the Wizardry series. Persona 4 is KINDA like a dungeon crawler, but it's a little bit easier and with random generated dungeons, but it's not really a dungeon crawler.

Etrian Odyssey doesn't have random generated dungeons though. They are already set and you have to draw them on your 3DS screen! You could give it a try but don't expect a good story!