The Oradin is a pretty solid combat healer. I found it overkill, so this character was going to be a full one, but I am taking some Mounted fighting feats.
Very simple.
Start with 2 Paladin Take 1-3 Levels of Life Oracle, pick up the Life Link (This is key!) and Channel Positive Energy revelation thingies. Hospitaler archetype for paladin also will give you more channel energy.
Feats: Fey Foundling (Inner Seas), Selective Channeling, Quick Channeling, Extra Lay on Hands.
I like playing Halfing with the Paladin alternate favored class bonus. +1/2 points of healing per Lay on hands.
So, with the 20 point buy: Str 14, Dex 11, Con 14, Int 10, Wis 7, Cha 18.
Pump up Cha for more lay on hands and channel energy.
Life Link will transfer damage from allies to you. Lay on Hands is a Swift Action on yourself, and will heal an extra 2 damage per die of LoH.
Channeling can help cover AoE healing and can be used as a Move action.
Standard actions are left for hitting things.
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As I said, I think it's a little overkill. I am starting with Fey Foundling, then picking up Mounted Combat, Ride-By Attack, and Spirited Charge for a nice Healer/Charger build.
I am playing an Oathbound: Vengeance Paladin for the Lay on Hands into smite, since the Paladin's innate Channeling is bad, and using channel in combat is too feat intensive.
Level 1, buy a Pony trained for war and a lance. Charge for the win.