The OC is better than many people say, and I have enjoyed it multiple times, but you should also try other campaigns, like the awesome Aielund Saga. Also, the next time you play SoU and HotU, follow it with The Sands of Fate series to go all the way to level 40. All of these and much more can be found at http://neverwintervault.org/
How about this for the OC?:
Level 20 Skull Smasher (Rogue 5 / Fighter 8 / Weapon Master 7)
Human, Any Alignment
Playable 1 - 20
Optional: Replace warhammer with scimitar, making you less effective against undead and other crit-immune, but more efective against those who are vulnerable to crits.
STR: 16 (21)
DEX: 14
CON: 14
WIS: 8
INT: 14
CHA: 10
Leveling Guide:
Human: (Quick to Master)
01: Rogue(1): Power Attack, Cleave
02: Rogue(2): {Evasion}
03: Fighter(1): Weapon Focus: Warhammer, Dodge
04: Fighter(2): STR+1, Mobility, (STR=17)
05: Fighter(3)
06: Fighter(4): Spring Attack, Weapon Specialization: Warhammer
07: Rogue(3): {Uncanny Dodge I}
08: Fighter(5): STR+1, (STR=18)
09: Fighter(6): Expertise, Whirlwind Attack
10: Weapon Master(1): Weapon of Choice: Warhammer
11: Weapon Master(2)
12: Rogue(4): STR+1, Blind Fight, (STR=19)
13: Weapon Master(3)
14: Weapon Master(4)
15: Weapon Master(5): Improved Critical: Warhammer
16: Weapon Master(6): STR+1, (STR=20)
17: Weapon Master(7)
18: Rogue(5): Toughness
19: Fighter(7)
20: Fighter(: STR+1, Great Cleave, (STR=21)
Stats:
Hitpoints: 240
Skillpoints: 163
Saving Throws (Fortitude/Will/Reflex): 11/4/13
Saving Throw bonuses:
BAB: 18
AB (max, naked): 25 (melee), 20 (ranged)
AC (naked/mundane armor/shield only): 16/26
Spell Casting:
Alignment Changes: 0
Skills:
Disable Trap 21(23), Discipline 23(28), Intimidate 4(4), Listen 21(20), Lore 14(16), Open Lock 21(23), Search 19(21), Tumble 20(22), UMD 20(20)
01: Disable Trap(4), Intimidate(4), Listen(4), Lore(4), Open Lock(4), Search(4), Tumble(4), UMD(4), Save(12)
02: Disable Trap(1), Listen(1), Lore(1), Open Lock(1), Search(1), Tumble(1), UMD(1), Save(16)
03: Discipline(6), Lore(1), Save(14)
04: Discipline(1), Lore(1), Save(17)
05: Discipline(1), Save(21)
06: Discipline(1), Save(25)
07: Disable Trap(5), Listen(5), Open Lock(5), Search(5), Tumble(5), UMD(5), Save(6)
08: Discipline(2), Save(9)
09: Discipline(1), Save(13)
10: Discipline(1), Listen(3), Save(14)
11: Discipline(1), Listen(1), Save(17)
12: Disable Trap(5), Listen(1), Open Lock(5), Search(5), Tumble(5), UMD(5), Save(2)
13: Discipline(1), Listen(1), Save(5)
14: Discipline(2), Listen(1), Save(7)
15: Discipline(1), Listen(1), Save(10)
16: Discipline(1), Listen(1), Save(13)
17: Discipline(1), Listen(1), Save(16)
18: Disable Trap(6), Listen(1), Open Lock(6), Search(4), Tumble(5), UMD(5)
19: Discipline(2), Lore(3)
20: Discipline(1), Lore(4)