HCF explicitly doesn't stack with WF. Aptitude works with feats, not non-feat class features, so flurry is no good unless you can find it in feat form and demanding a specific weapon. I'm not familiar with the Exoticist or H&R fighter variants so I dunno about that... I'm using the Targetteer variant from Dragon #310 for Vital Aim, which seems questionable but the DM's okay with it, and if he wasn't that would be okay by me... most of my damage comes from Blood in the Water, not from Dexterity.
For melee purposes I felt that a two-hander was ill-advised. I use a +5 unarmed strike (greater magic fang plus permanency) as my usual melee weapon because I don't have to put away the crossbow to wield it, it saves me actions switching modes between ranged and melee combat. Damage comes from strikes and from whatever bonus I've built up with Blood in the Water at that point. For situations in which the crossbow is not usable (cramped corridors and the like) I have a pair of Keen Aptitude Morphing shurikens, shaped into kukris (there's that 15-20/x2 crit again) to take further advantage of the feats I already have and of Blood in the Water, but so far I haven't run into any situations that called for them. If for whatever reason I felt the need for a two-hander, I'd most likely pick up a falchion or something else with an 18-20 base critical threat range.
Monk could certainly be used to pick up Improved Unarmed Strike, possibly other useful feats depending on the variant chosen. I chose to use Swordsage because the low amount of levels I had to work with left me unable to fit in any Warblade. Swordsage access to Tiger Claw maneuvers enabled me to grab Blood in the Water with the same dip that picked up IUS, and a few handy defensive maneuvers like Moment of Perfect Mind.