Whichever you choose, you'll still be getting a 10 mana 7/7 (plus a number of +1/+1 counters equal to the highest mana value of cards in exile) with annihilator x equal to the number of counters and ward that exiles half of your opponent's library
There is a lot of competition when it comes to Zombie-based decks, but Eternal Might is Esper (white/blue/black), an untraditional color trio for Zombies, allowing it to play unique white enchantments for extra boosts

Giada, Font of Hope Angels Giada, Font of Hope | Illustration by Eric Deschamps Commander (1) Planeswalker (1) Creature (32) Angel of Finality Inspiring Overseer Segovian Angel Speaker of the Heavens Herald of War Emeria Shepherd Sanctuary Warden Angel of Vitality Baneslayer Angel Starnheim Aspirant Serra's Emissary Sephara, Sky's Blade Valkyrie Harbinger Bruna, the Fading Light Angel of Destiny Mother of Runes Righteous Valkyrie Bishop of Wings Youthful Valkyrie Angel of Jubilation Witch Enchanter Weathered Wayfarer Linvala, Keeper of Silence Angelic Field Marshal Archangel of Tithes Lyra Dawnbringer Avacyn, Angel of Hope Gisela, the Broken Blade Esper Sentinel Archangel of Thune Serra Ascendant Resplendent Angel Instant (8) Swords to Plowshares Generous Gift Rebuff the Wicked Path to Exile Heliod's Intervention Akroma's Will Flawless Maneuver Teferi's Protection Sorcery (4) Austere Command Winds of Abandon Vanquish the Horde Emeria's Call Enchantment (8) Sigarda's Splendor Angelic Accord Dawn of Hope Court of Grace Luminarch Ascension Smuggler's Share Land Tax Smothering Tithe Artifact (16) Mind Stone Arcane Signet Sol Ring Well of Lost Dreams Oketra's Monument Nyx Lotus The Book of Exalted Deeds Herald's Horn Lightning Greaves Sword of the Animist Sword of Hearth and Home Archaeomancer's Map Vanquisher's Banner The Ozolith Pearl Medallion Marble Diamond Land (30) Myriad Landscape Seraph Sanctuary Plains x20 Bonders' Enclave War Room Emeria, the Sky Ruin Marsh Flats Prismatic Vista Wasteland Nykthos, Shrine to Nyx Cavern of Souls Ill be the first to admit that Im a sucker for angels

Beyond that, you have the usual suspects when it comes to making a tight EDH mana base: Theres fetches and shocks and duals, with the surveil lands feeling better than ever in a deck with reanimation spells (though Id play them regardless)
As long as you control Ratcatcher on your upkeep, you can search your library for a Rat, reveal it, and put it into your hand