There are tons of great coop board games out there. Here are a couple of my favorites that didn't make the PCG list.
The Grizzled - A World War 1 cooperative card game where players try to correctly navigate the dangerous battlefields in order to complete missions. Each task feels like a hopeless endeavor as you and your companions develop phobias of the various threats and missions become more difficult to complete. Teamwork and risk taking is the only way to survive.
Magic Maze - A dead simple concept that gets harder and harder to execute with more players. Four adventurers have entered the mall, but they are short of coin and must commit a good old fashion smash and grab. A single tile represents the starting position as the rest of the mall is shrouded in a fog of war. Navigating to the entryways at the edge of a tile allows a new tile to be placed and the heroes must find their weapon of choice and escape before the time limit is reached.
The twist is each player is dealt a card with a movement option on it, and they can only move characters in the direction on their card (players can move any character), and no one is allowed to talk. The game is broken in to several "levels" that each add additional obstacles and rules, such as being able to extend the time, or passageways only the dwarf may enter, for example. The additional layer of rules that come into play as the game progresses makes it incredibly easy to learn, but still challenging enough to creep back on the table months later.
The Mind - A concept so simple one would assume it was already a game. Each player is dealt a card. Cards are numbered from 1 to 100. Without communicating, players must lay down their cards in order from least to most.
Arkham Horror - The card game was mentioned in the article but the boardgame version holds a special place in my heart as one of the first boardgames I played and purchased. Despite your average play though taking three hours the game achieves a level of intensity that few games can, and it carries that intensity though the entire game. Whether you succeed in stopping Shub-Niggurath from awakening or are forced to fight it as a last resort, every game feels like it's own unique Lovecraftian tale.
Battlestar Galactica - TECHNICALLY Battlestar Galactica is a hidden role game, as one or more players may be traitorous cylons , however the bulk of the game revolves around solving crisis's aboard the BSG with your crew, fighting enemy ships outside, and weighting difficult choices to maximize your chances to survive.
Shadows Over Camelot - Similar to BSG, Shadows Over Camelot CAN be a hidden role game, but it really doesn't need to be. It's a hard as nails cooperative game where you and up to 6 other nights of the round table quest the lands to complete quests and save the kingdom. There are several different objectives and you need to carefully balance your efforts to completing each of them. If you focus on one, another may slip from your grasp, bringing ruin to the lands.