I've so got to go read some splat books. I have no idea what most of the feats and PrCs mentioned in this thread are.
But to address the OP I will once again mention the Human Fighter4/ Monk12 character I was playing in the Age of Worms AP, Surya of the Mountain. Yeah, it's the umpteemth time I've gone on about her on this forum, but who among us can resist an invitation to talk about our characters?
She had lots of versatility to make up for less raw power. She had Combat Expertise, Power Attack, Mobility, Spring Attack, Whirlwind Attack, Improved Trip, Combat Reflexes and Leadership. In combat I played her as a flanker who would cheerfully go anywhere on the battlefield, causing havoc among the enemy and supporting her team mates.
Of course the hard bit was getting the Priest of Kord to wait the one whole round for her to get into flanking position and try to trip an opponent before letting go with his Feat of Strength, buffed out the wazzoo, full Power Attack.
Out of combat she fulfilled the role of scout and trail blazer until later on a new player joined us and we got a ranger. Actually even after that Surya worked as the scout with the ranger as that character's player usually refused to leave the bosom of the party. Also she was much better at 3-D movement (climbing, jumping that sort of thing.)
ANd when she got her bard cohort at 12th level she was suddenly the recipient of buff spells, something that was in short supply prior to that. And bardic song too.
Too sum up: I loved playing her. She was fun, versatile enough to be involved in pretty much any scenario. Not a power hitter by any means, which could suck when the One Big Monster* reared its ugly head. But even there she would jump in, act as a distraction take some hits etc.
cheers all.
*The One Big Monster is my name for that tendancy in 3.X adventures to make many encounters with One Big Monster with high attack, AC and and damage. This monster is designed to take on the presumed Min-Maxed characters that the players will bring to the table. It tends to make for boring combats in that everyone rushes forward to stand next to each other and then slug it out.