Check with your DM about how they want to handle Diplomacy - it's pretty much broken by RAW. With only minor optimisation (getting an 18 in your main stat and putting points into a few synergistic skills that you'd probably want anyway) you can get a 50% change to turn an NPC from hostile to indifferent or from unfriendly to friendly ... at level 2. Most DMs houserule it one way or another to make it work the way one would expect it to.
That said, here's a basic build. I've left most of the DFI tricks until later in the build because at lower levels the bonus to the attack role can be more useful (particularly as the rogues may not have gotten weapon finesse online yet). At higher levels you're basically a sorcerer with bard tricks and buffs, but you have fewer spells known and are a spell level behind. Still, it should help to make up for Zoidberg. Bluff and diplomacy optimisation has been limited to picking skills for Synergy and grabbing a few useful items.
CG Silverbrow Human Bard 8, Warblade 1, Virtuoso 10, Sublime Chord 1
Order:
Bard 1-7, Virtuoso 1, Warblade 1, Bard 8, Sublime Chord 1, Virtuoso 2-10
Stats:
Minimum: Int 15 (I've assumed 16), Cha 15.
Pump Cha as high as possible, keep a reasonable Wis and Con, try to avoid a negative Dex, dump Str.
ACF:
1) Healing Hymn (CC) - Lose Fascinate (which you'll get back from Virtuoso 1), use a daily use of bardic music to add your Perform ranks to any Conjuration(healing) spells cast by your allies.
Feats:
H DFI
1 Melodic Casting
3 Song of the Heart
6 Words of Creation
9 Dragontouched
12 Draconic Heritage (Battle or Pyroclastic if you can get permission, copper, silver, or bronze otherwise)
15
18
Skills:
Bard 1-7: 9 points per level
Perform (String) (Cha) 10
Diplomacy (Cha) 10
Bluff (Cha) 10
Sense Motive (Wis) 10
Knowledge (Arcana) (Int) 10
Knowledge (Nobility) (Int) 5
Listen (Wis) 10
Profession (Astrology) (Who Cares?) 6
Intimidate (Cha) 4 (cross class, costs 8)
Spellcraft (Int) 10
UMD (Cha) 1
Virtoso 1: 9 Points per level
Perform (String) (Cha) 11
Diplomacy (Cha) 11
Bluff (Cha) 11
Sense Motive (Wis) 10
Knowledge (Arcana) (Int) 10
Knowledge (Nobility) (Int) 5
Listen (Wis) 10
Profession (Astrology) (Who Cares?) 6
Intimidate (Cha) 9
Spellcraft (Int) 11
UMD (Cha) 1
Warblade 1: 7 points per level
Perform (String) (Cha) 11
Diplomacy (Cha) 12
Bluff (Cha) 11
Sense Motive (Wis) 10
Knowledge (Arcana) (Int) 10
Knowledge (Nobility) (Int) 5
Listen (Wis) 10
Profession (Astrology) (Who Cares?) 6
Intimidate (Cha) 12
Spellcraft (Int) 11
UMD (Cha) 2 (cross class, costs 2)
Wasted 1 (Warblade)
Bard 8: 9 points per level
Perform (String) (Cha) 11
Diplomacy (Cha) 12
Bluff (Cha) 11
Sense Motive (Wis) 10
Knowledge (Arcana) (Int) 13
Knowledge (Nobility) (Int) 5
Listen (Wis) 13
Profession (Astrology) (Who Cares?) 6
Intimidate (Cha) 12
Spellcraft (Int) 11
UMD (Cha) 5
Wasted 1 (Warblade)
Sublime Chord: 7 points per level
Perform (String) (Cha) 13
Diplomacy (Cha) 14
Bluff (Cha) 14
Sense Motive (Wis) 10
Knowledge (Arcana) (Int) 13
Knowledge (Nobility) (Int) 5
Listen (Wis) 13
Profession (Astrology) (Who Cares?) 6
Intimidate (Cha) 12
Spellcraft (Int) 11
UMD (Cha) 5
Wasted 1 (Warblade)
Virtuoso 2-10: 9 points per level
Perform (String) (Cha) 23
Diplomacy (Cha) 23
Bluff (Cha) 23
Sense Motive (Wis) 10
Knowledge (Arcana) (Int) 13
Knowledge (Nobility) (Int) 5
Listen (Wis) 13
Profession (Astrology) (Who Cares?) 6
Intimidate (Cha) 23
Spellcraft (Int) 23
UMD (Cha) 14 (cross class, costs 18)
Wasted 1 (Warblade)
Wasted 1 (Virtuoso)
Maneuvers Known:
Leading the Charge (Stance, White Raven 1) - Allies gain a minor bonus on a charge
Wall of Blades (Counter, Iron Heart 2) - Make an attack roll to replace your AC
Iron Heart Surge (Iron Heart 3) - Remove any condition
White Raven Tactics (Boost, White Raven 3) - Change one ally's initiative, allowing them to act twice in a round
Items:
Along with the Big 6, try to get a Vest of Legends (+5 Bard levels for the purpose of bardic music) and a Circlet of Persuasion (+3 competence bonus to Cha based checks).
Notes:
Play a Mandolin (Complete Adventurer), as it increases your DFI or attack bonus by +1. Don't use DFI on things that are resistant to fire
. As for social skills, you get +6 in synergy bonuses to Diplomacy (from Bluff, Sense Motive, and Knowledge Nobility), so you can befriend pretty much anyone. With a high Cha and (generally) full ranks in Bluff you'll be able to lie convincingly. If you also pick up Glibness as a spell known (or stock up on scrolls/wands of it) you'll be able to lie so convincingly that they'll believe you over the paladin
. Intimidate is less likely to be useful, though, but it may be useful on occasion.
You could also be a regular Human. This will force you to take Dragontouched at first level (bumping Melodic Casting to 3rd and Song of the Heart to 9th), but it will give you one extra skill point per level. This will help if your DM is unhappy with you playing a Human that is descended from a dragon, and is probably better anyway.
This build does use quite a few books, though: (PHB, DMG, CAdv, CArc, CC, CM, ToB, DMag, RotD, Drac, BoED). If you need to cut this back, you could drop Warblade (ToB), Healing Hymn (CC), or battle or pyroclastic Dragon (RotD + Drac).