Do we know what is #18? It almost lookslike a real, usable sword, kinda reminds me of "Joyeuse" (well, the French coronation sword that didn't actually belong to Charlemange). It can't be Excalibur, since that sword type didn't exist in Arthur's time - well, unless it's Excalibur from some show that made that exact mistake. Looks like Oakeshott type XI from what we can see, though the fuller on it is just drawn wrong.
Oh, and since 2h kopesh is a new design some notes on that: it has a crossguard, that's an excellent idea, actually. I'd add some side rings for added hand protection, but they do get in the way a bit if you want to carry it. For once, the point is in line with the handle properly, kudos on that. It has one major problem though, balance. The blade looks about as thick as katana, which is about as thick as you can make a sword, and it's really, really long. That would make it incredibly blade-heavy, especially with no pommel to counter-balance it.
Normally, I'd not give it a pommel because that would make it far too heavy, but this one is obviously not made for human use, it's about the size of an adult, far too big for a choppy sword (yeah, Beidehanders are a thing, but they are primarily used to either thrust or counter pikes). So, either add a pommel to it, or make the blade thinner or shorter.
Last thing is the grip. Its end is too thin to comfortable grip, and you'd want to grip it there at least some of the time. Also, the ergonomic rubber nubs that are there to give your fingers safe grip should go all the way up to the crossguard in case you want to thumb or finger the guard - it's... less dirty than it sounds?
Also, Green Destiny has wushu hilt instead of proper combat hilt, but that's a problem of the original one too...