The best defensive stock for those situations is WMT, but you can think of other similar names as you reason through the why. That's where I'd go. There are many ETFs such as VDC (Vanguard Consumer Staples).
If you don't want to be so defensive, you could go VTV which is basically "large cap value stocks" so it still includes some Tech like Intel but it's way more diversified into other industries.
Gold is more inflation-related, so I wouldn't go there, at least not for the 40-50% draw down scenario you're describing.
You could usually try utilities or energy but those are also high due to AI buildout & Iran.
I think gold could make a come back since it's beating down a bit this year. Treasuries or just a reasonable hedge with puts against your holdings may be the best bet.
Of course none of this is financial advice & is just open discussion looking for thoughts.
Personally I went 80% world excl US and 20% equal weight S&P500 to hedge against what I think is an AI bubble. But if the market decides to adjust Nvidia's valuation 20% downward next week, I expect there to be ripple effects throughout the economy.
(Like the .com bubble, I think the tech is genuinely transformative and here to stay, but the valuations are just ridiculous.)
Your concerns sound valid provided things continue on as they have (I'm not a financial advisor and this is not financial advice) but the commenters above you are specifically worried that it's not going to do that. In which case, the disadvantages you point out of the equal-weight index will be handily outweighed. If an AI bubble popping causes the market-weighted funds to suffer, it doesn't matter that we've avoided trading fees along the way.