If I were in this situation, I'd go with a Half-Giant PsiWar, use a large, exotic polearm like a Greatspear (2d6 /x2 P, reach, RI 10'), take Expand as the PC's first power, and either wear spiked armor or take IUC as the next feat (for critters that get inside your reach.
Since the PCs Greatspear would be a Large weapon (Powerful Build) doing 3d6, psionic Expand (which can bump creature size 2x) would get that up to something like 5d6 base damage.
I'd also think about using DCv1, which is chock full of polearms and polearm feats, including Feats giving +5 Reach, shorten your grip so you can use it against adjacent foes, letting you use the butt end as a weapon, etc.
As a variant of this, you could also go Sword & Board with a Maul or Heavy Flail and a Spiked Shield. With the right enchantments (Bashing) & feats (like Improved Shield Bash), your off hand attack will be doing Bastard sword damage... You could even make the shield a Throwing/Returning weapon and be "Captain America." This variant has the advantage of giving your PC more AC.
As yet another variant on this, you could mix in levels of Warmage. There's a nice little spell- Whirling Blade- that lets you throw a slashing weapon and attack all the creatures in a line, with the weapon automatically returning to the hand of the caster. Tossing a Large Bladed (3.0 variant of spiked from Sword & Fist) shield or a Large 2hd weapon like a Greataxe and hitting multiple opponents is pretty tasty. AFAIK, you can't use this with Enlarge (once the weapon leaves the PCs hand, it would return to its normal size), but you COULD use it with the Metamagic feat sculpt spell (change line to cone, burst, etc.).
Since the PCs Greatspear would be a Large weapon (Powerful Build) doing 3d6, psionic Expand (which can bump creature size 2x) would get that up to something like 5d6 base damage.
I'd also think about using DCv1, which is chock full of polearms and polearm feats, including Feats giving +5 Reach, shorten your grip so you can use it against adjacent foes, letting you use the butt end as a weapon, etc.
As a variant of this, you could also go Sword & Board with a Maul or Heavy Flail and a Spiked Shield. With the right enchantments (Bashing) & feats (like Improved Shield Bash), your off hand attack will be doing Bastard sword damage... You could even make the shield a Throwing/Returning weapon and be "Captain America." This variant has the advantage of giving your PC more AC.
As yet another variant on this, you could mix in levels of Warmage. There's a nice little spell- Whirling Blade- that lets you throw a slashing weapon and attack all the creatures in a line, with the weapon automatically returning to the hand of the caster. Tossing a Large Bladed (3.0 variant of spiked from Sword & Fist) shield or a Large 2hd weapon like a Greataxe and hitting multiple opponents is pretty tasty. AFAIK, you can't use this with Enlarge (once the weapon leaves the PCs hand, it would return to its normal size), but you COULD use it with the Metamagic feat sculpt spell (change line to cone, burst, etc.).