Another idea to achieve the special effect of a graceful fighter who uses a big sword. Play a scout.

For this one you have to undestamnd the concept that special effects and game mechanics are not always the same thing.

In this case we change the special effect of your skirmish ability from being, "Your quick movements help you open up weak points in your opponents defense..." to "You quick movements help you buidl momentum to flatten your foes with overwealming power."

Same game mechanics but with different flavor text.

In this case you mix the Scout and the Ranger. You're taking ranger levels in order to pump up your base attack bonus as well as allow you to do your skirmish damage against undead and constructs which it normally can't effect. Since you're not using two weapon fighting, choose the rangers Ranged specialisation to give the character more versatility and pack a short bow as a back up weapon.

Take 4-5 levels of scout, and the rest all ranger. If you really want you could sprinkle a couple levels of fighter in there if you just have to have a couple of extra feats. You could also still lead off with your two levels of Monk if you like. You have enough feats over the course of the build to keep taking the Spring Attack & Power attack/Cleave trees if you like.

If you are going to take Spring attack, the Ranger get's an alternate class ability in PHB-II replacing your animal companion, that allows you to flank for your team mates as long as you hit your opponent with a wepaon. Even with a ranged weapon. So you could spring attack and still flank for your team mates. or you could stay at range and still flank for your team mates.