One possibility one might consider having a look at is is one of the funds that tracks the "MSCI World EX-US Equal Weight Index".
... One ETF is...
...
Sounds interesting, but the ETF from Invesco that you suggest is not “ex USA”

Sorry about the specific reference, failure in googling.
I think (?) I was able to find four European UCIT funds that track the ex-US equal weight index. But again, maybe even that was a failure in googling.

The all world equal weight might suit some folks, but of course it's not going to have relevance to anyone's goal of ex-US strategies.

Personally I am a big fan of rolling your own index rather than buying a fund. Get a broker that lets you buy stocks individually, and spend a weekend doing your own equal weight index. No management fees, and you can skip a few firms or industries or countries that you might find odious. You can give it a little bit of a "tilt" if you like, for example emphasizing higher-than-average ROE firms. (in the US in the last 30 years, the top 1/4 of stocks by ROE equally weighted beat the S&P 500 by around 2.7%/year...who doesn't like a tail wind?)

Jim