I couldn't find a good one. So I made one:

Demo: https://xcubicle.github.io/memorypaperwallet/

Source: https://github.com/xcubicle/memorypaperwallet

Most paper wallet generators just generate bitcoin and derived coins. There wasn't one that generated non-btc ones like ethereum and monero. And the artwork is user changable too! Feedback welcomed.

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I am still researching this topic, but appears that https://walletgenerator.net/ is a good place to start.

Note that best practices demand that you download the html+javascript application of a paper-wallet generator, and execute it locally on your computer: So for that process you should go here:

https://github.com/MichaelMure/WalletGenerator.net

Then you should use a "dumb printer", preferably only connected via USB and one that does not have any kind of memory.

If you are investigating paper wallets, I also recommend that you read about the Glacier Protocol https://glacierprotocol.org/ which is definately Bitcoin-focused but does seem to cover very clearly the pitfalls and work-arounds associated with long-term storage and process protection required for archival quality paper-wallets.