Avoid combat but be able to fight when necessary
It sounds, based on the personality profile you described, that you are looking for a character that will avoid combat when possible but will fight well and honorably when combat is unavoidable. You might want to think about Paladin, as the personality you are describing could easily fit the lawful good and you would end up with someone who could fight and cast a few spells.
If you decide to go cleric, I would definetly choose the strength domain both for the granted power and the spells. From the PHB domains I would recommend protection as the second domain. Protection spells have the benefit of making you better in combat (because you end up standing longer) while avoiding the more attack based spells. If you are able to use it, the Mysticism domain from the KoK PG would be even better.
Feat wise, I would focus on your goal of "avoiding combat". Buff and protection spells will make you a pretty effective combatant but taking feats such as Skill Focus: Diplomacy and Spell Focus: Enchantment can help with the non-combat stuff. Arcane Prodigy can be a better feat for a cleric than Spell Focus because their spells tend to flow across a variety of schools. With Arcane Prodigy, you will get +1 DC to all spells with a save instead of +2 DC to a particular school.
If you want to take a couple of levels in an arcane class, I would recommend the Spellsinger from KoK PG. The spellsinger requires only verbal components to cast spells so you would have no armor check penalty and with the feat "silent spell" could cast spells as an act of will. Even one level is spellsinger would give you access to charm person, which can be an incredible tool for avoiding a fight. (The downside of the spellsinger is that you have a limited "spells known" progression like a sorcerer but your "spells per day" are the same as a wizards.)
Other good feats for you might include improved initiative (clerics tend to have low dex and improved initiative can help you get off a charm person or hold person, preventing combat before it even starts). If you don't want to focus on undead bashing, you might consider some of the feats from Defenders of the Faith or KOK PG that give you alternative ways to channel positive energy. Beyond this, it becomes a matter of taste. If you want to up your combat ability a bit, take weapon focus. If you want to correct some of your weak points, take lightning reflexes. If you want to emphasize your strong points, take Iron Will (a cleric with Iron Will and a decent wisdom ends up with a truly indomitable will).
Stat wise, with the character personality you described, I would arrange stats in this order (highest to lowest), wisdom, charisma, strength, con, intelligence, dexterity. Clerics get crappy skill points but good armor which is why I feel intelligence is more important than dexterity.