Marcin Ciura has famously discovered many new Polish pangrams:

https://marcinciura.wordpress.com/2018/06/24/perfect-polish-... https://marcinciura.wordpress.com/2018/12/17/more-perfect-po...

And submitted an IOCCC entry in 2019 on the topic:

https://www.ioccc.org/2019/ciura/hint.html