While Ive mainly focused on ways to grant haste, dont forget that there are other ways to get value out of your creatures straight away
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Shadowfax, Lord of Horses For just 5 mana, Shadowfax, Lord of Horses can come out, attack immediately, and cheat out another creature from your hand for free
Games of Commander are frequently decided by how much mana players have access to
Demon of Fates Design, however, lets you approximate Bolas Citadel by casting one enchantment spell per turn with life rather than mana
There are more good cards than good answers and the decks are not focused enough to quickly wrap up a game like they are in a format like modern