Well, BardBlades are pretty awesome for TWFing. You said you don't want a cookie cutter build, so here's a modified version. It does rely on your DM agreeing that you can dual wield unarmed strike, though. How the build progresses depends on whether you're allowed to take flaws or not.
Without Flaws:
NG Human Bard 3 / Warblade 5 / Fist of the Forest (CC) 3 / Warblade 6-14 (Bard 3 / Warblade 14 / Fist of the Forest 3)
H Power Attack
1 Improved Unarmed Strike
3 Two Weapon Fighting
6 Superior Unarmed Strike
WB Great Fortitude
9 Song of the White Raven
12 Words of Creation (BoED)
15 Improved TWF
18 Greater TWF
With Flaws:
NG Human Bard 2/ Warblade 1 / Bard 3 / Warblade 2-5 / Fist of the Forest (CC) 3 / Warblade 6-14 (Bard 3 / Warblade 14 / Fist of the Forest 3)
F Power Attack
F Improved Unarmed Strike
H Two Weapon Fighting
1 Words of Creation (BoED)
3 Song of the White Raven
6 Superior Unarmed Strike
WB Great Fortitude
9 Improved TWF
12 Greater TWF
15 [Free]
18 [Free]
Useful Equipment:
Amulet of Mighty Fists
Vest of Legends
Masterwork Mandolin
Useful Buffs (Get your party Wizard to cast these, buy them a pearl of power or two if necessary)
Greater Mighty Wallop (RotD)
Haste
As you can see, this build is horrendously feat starved. Being able to take 2 flaws would be necessary for it to be realistically playable. It's also MAD as anything. That said, it should put out some impressive numbers, while not being game-breakingly powerful. Inspire Courage will give you and your allies +10 to attack and +8 to damage for at least 6 rounds, 3 times per day. With IC and Greater Mighty Wallop, your Unarmed Strikes do up to 12d8 + Str + 8. If you use both Raging Mongoose and Time Stands Still, you get 22 of those on a full attack (+2 if Hasted). The +10 from IC should ensure that most of those hit, too.
This build also qualifies for Bloodclaw Master. This PrC would fit perfectly with the animalistic fluff of a Fist of the Forest. If you're willing to bend the 2 Base classes + 1 PrC rule, it would be well worth considering.
I thought about including Dragonfire Inspiration, but this build is just too hard up for feats. If you're taking flaws, you could play as a Silverbrow Human and fit it in, but by the time you'd have room most CR-appropriate enemies will have fire resistance. Since you can't take more than 2 flaws you can't take Dragontouched and Draconic Heritage to turn that into a more useful energy type. That said, the attack bonus is probably more useful to you anyway, so I'd be surprised if it was worth the hassle.