The President

Hexproof
The President acts as an enchantment and can't
attack or block but can still be a commander.
Pay {r}{w}{u}, then search your deck for any card
with the phrase "Solar Warden" in it and play it
without paying its mana cost.
Any red, white, and blue permanents you have
are Hexproof and can't be the targets of abilities
and effects.