My pod is gearing up with "high power" commanders - want one, too!

Hey there!

We started playing a while ago in a pod of around 8 players. We played in our own bubble of precons and slipped some cards into it, but had so much fun, that some of us already invested in higher power decks.

In what I understand, these aren't any cEDH deck, but their commander all feel like you can't let them stay on board. Everytime someone untaps with their commander, they get very close to winning or their commander just has so much synergy (even without being played), that I can't keep up.

My friends got inspired mostly by the "top commanders list" on edhrec. Not sure how meaningful that list is, but these listed commanders feel strong only by reading them. Here are the ones they are playing:

[[Miirym, Sentinel Wyrm]]
[[Edgar Markov]]
[[Kaalia of the Vast]]
[[Meren of Clan Nel Toth]]
[[Atraxa, Praetors' Voice]]
[[Yuriko, the Tiger's Shadow]]
[[Urza, Lord High Artificer]]

At the moment I'm on [[Yuma, Proud Protector]] and [[Kasla, the Broken Halo]]. These are fine, but by far don't feel as strong. So I don't want to invest in upgrading them and rather buy and build a deck from scratch.

The decks of my friends are between 500 and 1000$, which I'm fine spending on my deck, too.

What would be your recommandations for a commander on that level? I don't want to counter them, just gear up on the same level. So far I like every color, but I wouldn't like a mono color (or colorless deck). Winning with combat is nice, but having options to win without attacking seems important against some of them. Also being resilient would be nice, so no topdecking endgame some defensive strategies to negate and alpha strike would be fun.

Thank your very much for your help!