Now these points of data make a beautiful line.

mcu flavor of Alpha Flight's Sasquatch

6'6". Heavy build, 200lbs. Walter owns exactly fourteen white shirts, dozens upon dozens ties, a few jackets, and seven identical pairs of pants.
His parents knew each other when they were children. They married and immigrated to Vancouver.
Raised in a Jewish-Polish household with both sets of grandparents and his aunt.
Football scholarship to University of Toronto
Had an offer to play for the Green Bay Packers. Turned it down because of a girl.
That girl? Veronica. He got her pregnant, they got married. A boy, Gideon, was born. Then Veronica divorced him.
Holds degrees in Mathematical Physics, Theoretical Physics, and Biophysics. That sounds about right, yeah?
After leaving Toronto, went on to study at MIT [I swapped Green Bay out for MIT, makes more sense to me]
Attempted to give himself powers with gamma rays combined with the Aurora Borealis. Instead, opened up a portal to the Realm of Great Beasts. Walter became a vessel for Tanaraq. It possesses him and gives him the ability to switch into his Sasquatch form.
The incident with the portal knocked out all the power and cost MIT several thousand dollars in damages. Walter was nearly thrown out.
Had mild radiation sickness at one point. Since the manifestation of his powers, that seems to be the least of his problems.
Walter's powers at first manifested in strange blackouts and loss of time. He'd wake up naked and in the woods. At first, Walter thought it was sleepwalking brought on by stress.
Walter finished up at MIT and went on to teach classes at McGill University in Montreal.
Suddenly, the Bigfoot sightings in the area go crazynuts.
Oh shit it turns out he's Bigfoot. Walter regains consciousness and REMEMBERS EVERYTHING.
And as if on cue, Dept. H recruited him. He was put through tests, boot camp, and deployed into Gamma Flight as Sasquatch. He's now in Alpha Flight.
So he works as a Superhero and For The Government but also is a professor at McGill university. One class, once a week, makes him feel awesome.
WALTER IS A DICK WHO FOUGHT THE HULK FOR FUN.