For me? Let's see...
Brawl:
Marth
Ike
Now:
Marth
Lucina
Roy
Chrom
Ike
Corrin
and just so that I'm not just dunking on FE:
Shulk
Hero
Every Link ever
It's just over saturated and I can't see him bringing something unique anymore. I've said before that back in Brawl speculation I thought Lloyd would have been super cool, but I'm just not warm on him anymore.
I gotta admit, we ARE pretty saturated with Swordsmen (you forgot to add Metaknight and Cloud to your list). Not to say that many of them don't offer their own unique charm, but Hero's normals are proof that the dev team's imagination is kinda running dry on sword moves. It's getting to the point where we can literally describe a swordman's moveset by simply referencing the other swordsmens' moves. I remember when they unveiled Chrom and my friends and I were trying to analyze his moveset from his trailer video:
"OK, looks like he's got Ike's Up B, Marth's side B and Roy's jab...."
Of course now we know that Chrom is SUPPOSED to be Roy's echo, but again, we just see mixing and matching:
"Looks like Hero's got adult Link's dash attack, Ike's forward Smash, Marth's up smash (albeit with a tiny hitbox), etc, etc."
Now, in Lloyd's defense, a fast, dual wield style could lend itself to some pretty sexy combos, especially if some kind of Arts mechanic is mixed in to allow for aerial combos a la Bayonetta, but he would have to be noticeably original for people not to moan like crazy.
You know, I'm not a huge Star Wars fan, so neither of those really stick out in my mind. I just love to poke fun at how over the top the swordplay is in Star Wars.
The most hilarious example of over-the-top Star Wars swordplay was in Revenge of the Sith when Anakin fights Obi Wan on the lava planet. They're both standing on top of a table and there's this moment when they're both flailing their swords around in the air for a few seconds before finally continuing their fight. I mean, it looks kinda cool the way they swirl the light sabers around themselves but realistically it's just laughably stupid to do in an actual fight to the death. One of them could have simply stabbed the other in the belly while they were showing off. LOL