Nice haul, they oughta keep you busy for awhile!
The Columbia looks great! 1969.
The black bike is a Worksman of course. They don't ID by the serial numbers. But you've got the whole bike, looks like it hasn't seen much riding. It should clean up nicely. It has the heavier forks that I prefer over the tubular kind. Worksman are New York USA built and are known for their heavy duty wheels.
The Schwinn has the big chainwheel that was used on a lot of the older models, 52 teeth. I think it's a late 40's early 50's bike, but that's guessing those those are the right forks. The forks need help, they are bent and are put together wrong, and need the trussrods. But they can be fixed. The chainguard isn't Schwinn. At worst, the frame looks okay. At best, it's a phantom frame and forks. That would be very long odds of that happening. The phantom had a particular paint scheme, that's how many of the old cantilever frames are ID'ed.
They used the same frame on the deluxe models as the bare bones bikes. I had a 53 Meteor that was the bottom of the line, but had the same frame as a phantom. I made it a three speed too, but not with skinny tires.
When you check that bike, carefully remove the yellow paint to see what's underneath. That may show what model it is. The serial will be one of two places. Bottom bracket or dropout. I'm pretty sure they didn't sand it down, they painted right over the cranks and everything. The original color is seen inside the frame where the cranks go through and on the upper part of the fork where it goes through the frame.