Along the same lines of Close Wounds, and also in SpC, is Delay Death. It will just plain keep someone from dying due to hp damage for round/level, and is an IMMEDIATE action! Of course, without Diehard feat, Fierce Pride of the Beastlands spell, or simlar effect, the target will still be laying there unconscious. But at least he won't die.
Spell Compendium has much more to offer, too:
You oddly did not mention the Revivify spell. Every party should at the least have scrolls of this (with some means of being able to draw it, move up to the fallen guy, and still have a standard action remaining) for when the healing is not enough or is too late.
The fortunate fate spell is basically paying +1 spell level to turn Heal into a contingent spell. In other words, you automatically get heal when you need it, and don't have to spend an action doing so. This is a great deal!
Healing Lorecall is an absolute STEAL. Only a 2nd level spell, 10 min/level duration (hint: lesser extend rods are only 3k), and for a middling amount of Heal skill ranks, you can remove some pretty nasty status effects up to and including DAZE with ANY conj (healing) spell you cast, even cure minor wounds!!!
Outside of SpC...
A Shadow Sun Ninja (tome of battle), even with just a 1 level dip, can heal an amount equal to his unarmed strike damage. Which can be maxed out through optimization. The best part is it's unlimited use. Only catch is that you need to deliver a negative energy version between each healing use, it's a yin-yang thing. So... have your SSN be a Necropolitan or have tomb tainted soul. Or have an ally w/ undead minions. Viola! Infinite use large amount healing. Or in combat just alternate rounds healing allies and maiming enemies.
Amulet of Retributive Healing (MIC): This amulet is dirt cheap (2000 gp), so you can easily add it for +50% to another amulet if you want. 3/day as a swift, you can heal yourself the same amount you just healed someone else. That's like free Twin Spell on Heal 3/day! If you're going to be the heal bitch, might as well pick this up, cause you just know the enemies will be trying to shoot the medic.