There was also a fourth large Dracaena marginata with the same root issues. I didn't bother carrying that one up to my place because I figured it will eventually just die. But maybe there is a way to save it?

So here is the biggest one:

The D. marginata not pictured - you could just cut off whatever top part(s) you like and it should root that way. Unless it's gotten too cold, no reason to expect it to not do well especially if it looks as good as these plants.

You can also propagate the top(s) of the corn plant if you want to. One or two new tops should appear at the cut on the mama, give the severed top a pot big enough pot to hold it up, or in the pot with the mama. I would repot that when convenient. Eggshells belong in the compost first, IMO. Would be interesting to know what deficiency or malady they were intended to battle... there's some teeth to some of these kinds of things, some are just old wives' tales... This tree's a mostly-shade plant in summer but may need some direct light inside for winter.

I'm a huge fan of growing vines UP instead of down if there's a reason to (juvenile/mature leaf forms is one that applies to the Pothos) and don't know what the goal of the tomato cage support was, but that could have had something to do with it. You can keep supporting it, or let it dangle. Not picky about sun, but can't handle mid-day sun in the summer. Famous for surviving low light but doesn't grow as quickly that way. Very easy to propagate.

Philo, similar to Pothos, although some Philos will make really long, stringy aerial roots (which may be possible also for Pothos but not something I've seen.) New leaves are often a different color initially. Probably guttates. Direct sun may burn it in the summer.