Your best bet for Birthright is either Predominant Galura, Neutral Zeel, or Predominant Sini. Let me simplify things somewhat: PG would have the advantage over the other two in Nemesis, but disadvantage in Leon, Eyrie, and Daimon. NZ would have the advantage over the other two in Eyrie, but disadvantage in Nemesis (which is not fantastic for your purposes, but acceptable). PS would have no advantage over the other two, and disadvantage in Grand, so I'd say only take that if you're attracted to what the blue-blooded Sini represent.
PG would have Leon 3, Eyrie 3, Grand 4, Enlight 4, Nemesis 6, Daimon 5
NZ would have Leon 4, Eyrie 5, Grand 4, Enlight 4, Nemesis 3, Daimon 6
PS would have Leon 4, Eyrie 4, Grand 3, Enlight 4, Nemesis 4, Daimon 6
Now, if you didn't take any boosts and reductions, PG would give you the Sage basic class. You would have a power to ask inanimate objects questions, a power to change your appearance, and a power to avoid harm. The subclasses available to you would be divided into three categories for simplicity: Insight, Recondite, and Martial Master.
Insight is the at-a-distance category, which has: Visionary (or Magic Prophet), and Patron (or Mystic Sovereign).
Recondite is the alternative category, which has: Monk (up close Visionary), Therapist (up close Patron), or Deliverer (basically a Visionary on a horse).
Martial Master only has one subclass in it: the Nemesis Master. Unlike its less-violent counterparts, it uses its experience and abstract thinking to enhance your ability to kill.
NZ and PS would give you the Aesthete basic class. You would have a power to hypnotize, a power to deceive the senses, and a power to evade capture. The subclasses available to you would be divided into three categories for simplicity: Socialite, Winsome, and Martial Jester.
Socialite is the at-a-distance category, which has: Hellraiser (or Magic Fool), and Diplomat (or Mystic Savant).
Winsome is the alternative category, which has: Scapegoat (up close Hellraiser), Escort (up close Diplomat), or Standard Bearer (basically Hellraiser on a horse).
Martial Jester only has one subclass in it: the Daimon Jester. Unlike its less-violent counterparts, it uses its deception and madcap antics to enhance your ability to kill.