1:) Rogue - Some archetype that makes poisons genuinely worthwhile in combat. Nearly all of the poisons available have such abysmally low DC's that they only seem truly useful against enemies with few NPC class levels.
2:) Cleric - Merciful Healer. I like the idea of this Holy Warrior that has dedicated themselves wholly to helping keep others alive by the power of their deity.
3:) Ranger - Falconer. I just think Falconry is really cool.
4:) Ranger - Some sort of Elf specific archetype focused on the sniping mechanic. Extra sneaky bow elf stuff.
5:) Tower Shield Specialist - Tower shields aren't used nearly enough considering how cool they are. It's nice to have someone that focuses on them as part of their build.