And that's just current predators. Don't forget that in order for BF to exist, he'd have to have survived since, oh, let's say the end of glaciation at the least. So, the short-faced bear and the "dire wolf" come into play; the buffalo wolves, for those that crossed the Great Plains (on their way to Georgia); plus early North American Man. I would expect that, if Bigfoot existed, we'd see bits of BF bones in the middens: Those long, thick bones would be great for tool-making, for example!
More importantly, all of the megafauna listed above are known because we have examples. And, yes, even in the northwest, we have decent fossils. The Burke Museum at the University of Washington has some cool stuff, for example, from more local digs. We have the preserved remains of coastal AmerInd houses preserved by mudslides; we have entire forests submerged by catastrophic earthquakes. It seems likely that somewhere, somehow, at least ONE bigfoot bone would be preserved. Some furry body found when an avalanche chute thaws out in the spring, at least.
And, as mentioned previously, we'd also see impacts on the other predator and prey animals from having an apex predator or competing grazer in an area. And we'd see evidence of their kills. Or are you supposing that they consume every shred of their kill, bones, hooves, and all?
We find kills from other animals; we find scat. Heck, we find scat from human hunters!
The copious absense of sasquatch and his forebearers from the fossil and more recent record requires a serious suspension of disbelief to get past.
Don't get me wrong, if somebody brings in a body that passes muster, I'll be thrilled. But I will also be quite surprised.
just my thoughts, MK