Which paper wallet generator still functions today?
I will advice you to use HD paper wallet, like using Electrum wallet or Iancoleman on an airgapped device with a newly reinstalled OS, making sure Bluetooth, WiFi and other connectivity means are removed or not working while generating the HD paper wallet. You do not have to worry if you want something similar to BIP38 encryption, just use passphrase. But if you like the old ways, use
https://github.com/pointbiz/bitaddress.org zipGenerate the wallet, backup the wallet offline on paper or on steel sheet and delete the wallet which makes it a paper wallet.
Also is there any risk using paper wallet apart from keeping the phrase offline?
The risk is if you do not generate it properly. If you want to hold only bitcoin and not spending it for a long time, paper wallet is good, your keys are offline, and online attacks won't be possible. But protect your seed phrase. If you add passphrase with it, do not backup seed phrase and passphrase together but differently in different locations.