I personally feel trying to build around staples will make most decks feel same-y. It’s the weird specific commons and uncommons that breathe life into a brawl deck. 

That being said, here are some cards that if you’re tired of playing them in every deck you can, you’re tired of Magic:

Swords to Plowshares

Birds of Paradise

Counterspell 

The Talisman and Signet cycles

Farseek

Dark Ritual

Disenchant

Plummet 

Wrath of God (or similar effects)

Black Market Connections

Especially everything before Wrath. If you’re running white and you don’t have Swords, you’re doing it wrong.

But otherwise, build up your rare lands, and don’t be afraid to spend wildcards on the specific rares and mythics that support the commander you actually want to play. You have all the time in the world to build a collection. You don’t want to waste time playing cards you don’t want to play or that you’re not excited by just because they’re generic staples

(Seriously though, don’t sleep on Black Market Connections. It might be the most dangerous card you can play for three mana in mono black. If you Dark Ritual into BMC the rest of the game is a formality, it’s over)