I was kinda sad to see that they didnt let us choose between 1 handed and 2 handed versions of these weapons. so i went and did it myself. as i dont really know much about modifying dialogue and quest rewards these items can only be added to your game via the console.
to add them type:
help "two-handed"
and it should give you a list of them as follows(xxxxxxx is the additem code):
Note: the 5 dragonbanes corespond to the leveled status of the item.
xxxxxxx Two-Handed Blades Sword
xxxxxxx Two-Handed Bolar's Oathblade
xxxxxxx Two-Handed Dragonbane
xxxxxxx Two-Handed Dragonbane
xxxxxxx Two-Handed Dragonbane
xxxxxxx Two-Handed Dragonbane
xxxxxxx Two-Handed Dragonbane

then use player.additem xxxxxxx to add them to your inventory.

They all use the two-handed skill tree for perks and are considered to be greatswords for the deep wounds perks. They also retain all the enchantments of their former 1 handed versions.

Compatibility:
Texture mods should be compatible with this as i didnt modify any of the textures.

Manual Installation:
Extract rar to your main skyrim directory.

NMM Unstallation:
just click on activate.

Known Bugs:
None so far. Be sure to let me know if you have any issues with bugs or compatibility.