Be sure to check the Answered Questions Hider so see if i have a response there too.

[quote=@AcerRo]
What about duel wielder or Rogue type characters? 
[/quote]

Some of the Highest ranks would be unreachable for you, as your not a standard knight, but you will still be considered a type of knight, 

though your brand of fighting is still accepted and taught in the order, though you will be treated with some disrespect by other knights  for being shadier and not valiant enough to stand among the Vanguard.