A a two-staffed high elf templar would definitely be a good character, as healers are always in high demand! However, you will find it very difficult to do the PvE sections of the game on your own, because such a character would need to have low life and high magicka. If you are planning to experience ESO on your own, I would advise you to go for a more tank-like character, like an orc dragonknight.