Vigilance

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Click here for my EDH Commander decks
 
Tons of creatures with Vigilance
Has effects with "Tap a creature you control to do something"; so you attack, then can still do something else later.
Note that a completely different build involving Stasis-type cards is possible; I have some possibilities in the sideboard.
 
Mana Acceleration (11): General (1): Spells (21): Sideboard (Omitted/Cut card ideas):
1 Chromatic Lantern 1 Horde of Notions 1 Temporal Aperture 1 Krond the Dawn-Clad
1 Coalition Relic   1 Glare of Subdual 1 Lightning Angel
1 Gilded Lotus Creatures (32): 1 Maelstrom Nexus 1 Meglonoth
1 Thran Dynamo 1 Aurelia, the Warleader 1 Phenax, God of Deception 1 Sentinel of the Eternal Watch
1 Unstable Obelisk 1 Chromanticore 1 Conspiracy 1 Arena of the Ancients
1 Warden of Geometries 1 Godsire 1 Skirsdag High Priest 1 Juntu Stakes
1 Mirari's Wake 1 Guardian of Vitu-Ghazi 1 Mind Unbound 1 Meekstone
1 Steward of Valeron 1 Ith, High Arcanist 1 Opposition 1 Stasis
1 Circle of Elders 1 Jelenn Sphinx 1 Tradewind Rider 1 Crackdown
1 Mana Reflection 1 Kalemne, Disciple of Iroas 1 Elemental Bond 1 Energy Storm
1 Zendikar Resurgent 1 Ojutai, Soul of Winter 1 Lurking Predators 1 Marble Titan
  1 Razia, Boros Archangel 1 Nullmage Shepherd 1 An-Zerrin Ruins
Lands (35): 1 Risen Sanctuary 1 Burning Anger 1 Wrath of Marit Lage
1 Underground Sea 1 Skyward Eye Prophets 1 Kyren Negotiations 1 Dream Tides
1 Bayou 1 Sphinx of the Steel Wind 1 Smoke 1 Thelon's Curse
1 Badlands 1 Stoic Angel 1 Diversionary Tactics 1 Magnetic Mountain
1 Scrubland 1 Tariel, Reckoner of Souls 1 Hand of Justice 1 Mudslide
1 Tropical Island 1 Teysa, Envoy of Ghosts 1 Heliod, God of the Sun 1 Uphill Battle
1 Volcanic Island 1 Vorapede 1 Mobilization 1 Kismet
1 Tundra 1 Tahngarth, Talruum Hero 1 Righteous Confluence 1 Loxodon Gatekeeper
1 Taiga 1 Adarkar Valkyrie 1 Sandsower 1 Felidar Sovereign
1 Savannah 1 Akroan Phalanx   1 Bruna, Light of Alabaster
1 Plateau 1 Akroma, Angel of Wrath   1 Darksteel Sentinel
1 Hallowed Fountain 1 Avacyn, Angel of Hope   1 Batterskull
1 Temple Garden 1 Avacyn, Guardian Angel   1 Chancellor of the Tangle
1 Sacred Foundry 1 Elesh Norn, Grand Cenobite   1 Predatory Urge
1 Arcane Sanctum 1 Gideon's Phalanx   1 Malicious Intent
1 Jungle Shrine 1 Herald of the Host   1 Quicksilver Dagger
1 Seaside Citadel 1 Hundred-Handed One   1 Argentum Armor
1 Mystic Monastery 1 Kalemne's Captain   1 Presence of Gond
1 Nomad Outpost 1 Konda, Lord of Eiganjo   1 Surestrike Trident
1 Sandsteppe Citadel 1 Luminate Primordial   1 Siren Song Lyre
1 Mystic Gate 1 Nacatl Hunt-Pride   1 Leonin Bola
1 Wooded Bastion 1 Radiant, Archangel   1 Dragon Throne of Tarkir
1 Rugged Prairie 1 Twilight Shepherd   1 Ravenous Leucrocota
1 Celestial Colonnade     1 Bull Cerodon
1 Command Tower     1 Geist-Honored Monk
1 Exotic Orchard     1 Ruric Thar, the Unbowed
1 Grove of the Guardian     1 Predatory Urge
1 Holdout Settlement     1 Savor the Moment
1 Krosan Verge     1 Sun Titan
1 Mosswort Bridge     1 Archangel
1 Reflecting Pool     1 Urabrask the Hidden
1 Slayers' Stronghold     1 Angelic Benediction
1 Spinerock Knoll     1 Bartel Runeaxe
1 Vault of the Archangel     1 Oakgnarl Warrior
1 Windbrisk Heights      
1 Sol Ring