[Suggestion] SAMURAI

[Shougun]

The way people see Samurai (in game) would be solely with a Katana of course, even though generally they would use other weapons over the Katana (that big umbrella term) in war and make it a secondary weapon - Samurai were actually well versed with a bow or spear-like weapon (making the Katana something like a very pretty emergency life saver). The Katana is not a load bearing weapon and so I do not see Samurai's natural spot based on Katana as a tank (the blade is hard and the edge is brittle, not bendy like a western sword), I think weapon wise it makes more sense to be a destroyer of lightly armored targets and large targets when well focused to weak spots.

Personally I see the Samurai fitting next to the Dragoon in terms of heavy DPS (Dragoon armor has some heavy options, AF is all metal). That and I feel it is a bit copy pasta to go two two handed sword wielders as tanks that both rely on dodging, parrying, and X. Rather they smooth out the pool of options, people mention red mage as DD for a sword weapon and good now you have one one handed sword tank one two handed sword tank and the same respectively for DD (even though Red Mage should have a high magic emphasis).

[Shippuu]

The Katana is not a load bearing weapon etc.

This has absolutely no impact in a fantasy video game. Nothing about Axes and Greatswords lend themselves to "tanking" anymore than any other weapon. If it's a "destroyer of lightly armored targets" then it would take a penalty against any enemy with hard skin or metal armor, now you have a DPS that does less damage against most enemies, congrats.

All tanks have parrying to a degree, and high defense. There is no problem having both DRK and SAM have skills that boost their parry or dodge. There is also no problem in having both DRK and SAM wield two handed swords (Alternatively SAM could dual wield a katana and wakizashi, making it unique.) Even then, the way DRK hold their sword is likely intentional, they hold it in a downward posture and this creates less animation similarities if they add a two handed katana like weapon which is typically held upward.