An eladrin spear fighter actually works quite well. If you're starting at 11, I'd go with:
Str 18, Con 10, Dex 15, Int 10, Wis 13, Cha 10, so at 11:
Str 21, Con 11, Dex 16, Int 10, Wis 16, Cha 10
Paragon Path: Kensei (greatspear)
Feats:
Eladrin Soldier
Weapon Expertise (spears)
Polearm Momentum
Toughness
Power Attack
Polearm Gamble
Uncanny Dodge (retrained at 11)
At-wills:
Footwork Lure (can slide 2 and knock prone w/polearm momentum)
Brash Strike (no downside, since uncanny dodge protects against the CA)
For the rest of the powers, there's some flexibility. Rain of Blows used to be amazing, but now it's just pretty good. Perhaps something like:
1 Passing Attack
1 Tempest Dance
2 Shrewd Repositioning
3 Rain of Blows
5 Rain of Steel
6 Defensive Training
7 Come and Get It
9 Stop Thrust
10 Defensive Resurgence
11 Masterstroke
For gear -- aside from your favorite weapon, armor, and neck, some nice items are:
Iron Armbands of Power (+2 damage on all melee attacks)
Boots of the Fencing Master (shift 2 as a minor 1/enc, +1 AC/ref whenever you shift)
Strikebacks (+1 to OAs, free melee basic 1/enc when hit)
A few things for upcoming levels:
For feats, Reserve Maneuver (to swap out Masterstroke for a fighter power) and Armor Specialization (Scale) are both great.
At 13, Silverstep is pretty good, and at 15, Quicksilver Stance is amazing.