With all respect ... if you know "very little" about the Melee Class, then ... you can't really speak much on it.
Meanwhile, I specialize in it, it's what I play the most, so uh. Trust me on this?
Of that list...
Only the Death Sickle is really commonly used either because of Rarity, too much effort to craft (Phasesaber), or because there are simply better weapons around, or they are just impractical (Anchor, Breaker Blade).
That and you're listing early hardmode weapons, rather than late hardmode. Wanna know what a typical Melee progression looks like? It's something like this...
Wooden/Cactus Sword -> Ice Blade (if you find one) -> Night's Edge / Blood Butcherer -> Night's Edge (sometimes temporarily using the Fiery Greatsword for a short bit).
Then, once you're in Hardmode, it's usually something like this:
Bladetongue (a must get if you have Crimson!) -> Amarok -> Yelets -> Eye of Cthulhu/Terra Blade -> Solar Eruption/Daybreak.
Now, of course, that's not strict and set in stone, there are a few other notable mentions, but most are not worth going out of your way to look for one. Vampire Knives and Scourge of the Corruptor can both have a place on your hotbar, but the keys are too difficult to farm for them specifically and are usually skipped.
There are other weapons, like the Seedler (if it actually drops while it is still useful), the Death Sickle is also awesome if you get one to drop while it is still useful (Pre Terra Blade), and some of the Pre-Hardmode Yo-Yos can be reasonable substitutes for melee weapons, even post-nerf, an early Amazon can still be a reasonably effective weapon, and if you happen to get a Cascade to drop before killing the WoF, that can still work too.
But... here's the thing.
Against the Mechs, Plantera, and Golem, what Melee weapons are actually useful?
Bladetongue and the Fetid Baghnaks against The Destroyer, absolutely. But Prime and Twins? Absolutely not. Amarok will work against the Prime, but against the Twins, the range is a bit too short for my liking; I constantly get clipped with the green fire "breath" in the 2nd phase of the green eye because it's hard to actually deal damage and not get nailed with the fire streams, so I tend to not want to use Amarok for that. You could go to farm a Yelets, but it'll be much of the same, only slightly better DPS.
Otherwise.... I can't think of a single actual good melee weapon to use against Twins, or Plantera. Plantera basically has the same problem Twins do -- everything that does Melee damage has too short of range, though you can use a Yelets, I've done it. It's just not as easy as grabbing, say, a Megashark and using it despite wearing Melee armor (which is what I usually advise Newbies to do).
This is the problem with melee weapons lacking projectiles. They just aren't useful against fast-moving bosses with attacks like the aforementioned green fire.
I'm fairly sure this is why Re-Logic gave so many late-game Melee weapons projectiles in the first place, to make sure they retained usefulness beyond killing small fry.
EDIT: When I said "I can't think of a single melee weapon to use against Plantera" ... ok, there is Death Sickle. I did that once, and it worked rather well. But. Unless you have a perfect dungeon setup (assuming you're not cheating with hoiks: might as well just get any weapon you want from the builder's workshop at that point), you're probably not getting tablets early (Pre-Plantera) and so you must rely upon a Solar Eclipse happening after the 3 mechs but before Plantera, and, a Sickle needs to actually drop. You'd probably have better chances of winning the Powerball.