Paragon Hybrid - Hybrid class: Choosing the Paragon Hybrid paragon path grants you access to an additional hybrid talent. Some hybrid classes have ability score substitutions available as hybrid talents (check class listings above).
Daring Blade - Bard, any martial class: Use CHA for attack/damage with martial melee powers
Does anyone have any other suggestions to add?
I'm curious to know if there are any Paragon Paths, Epic Destinies, Backgrounds, Themes, etc. that I may have missed.
Let's see... Strong Arm Tactics (Half-Orc feat) lets you use Strength instead of Charisma for the Intimidate skill. Cincture of the Dragon Spirit (Item) also lets you use Strength instead of Charisma for the Intimidate skill. Babau Gauntlets (item) let you make melee basic attacks using Dexterity instead of Strength once per turn. Bracers of Mental Might (item) let you use Charisma, Intelligence or Wisdom in place of Strength when using an attack, skill or ability check, as an encounter power. Blessed Strength (Half-Orc Paladin feat) lets you use Strength instead of Charisma for Divine Challenge and Divine Sanction. Quick Reactions (Battlemind feat) lets you use Charisma instead of Dexterity for initiative. Internalise the Basic Kata (Monk feat) lets you make melee basic attacks using Dexterity instead of Strength if using the Monk Unarmed Strike. Agile Superiority (Fighter feat) lets a fighter use Dexterity instead of Wisdom for the Combat Superiority class feature. Serene Archery (Feat, must worship Sehanine) lets you use Wisdom instead of Dexterity for ranged basic attacks with a bow.
Of related interest, Cincure of the Githzerai (item) lets you use Will in place of Fortitude against an incoming attack once per day. Belt of Fitness lets you use an Endurance check in place of fortitude against an incoming attack once per day.