Not open source or free but I find PragmataPro [0] to be absolutely gorgeous. Iosevka comes close but I don't think it'll ever be able to bridge the gap for me.
What makes you like Pragmata Pro better? Do you think it's almost $250 dollars better than Iosevka?
Great fonts bring me a lot of joy, but Pragmata Pro always felt fairly ridiculously priced to me. I know the author put a lot of time into it, but 99% of the font's features are irrelevant to me (I'll never use Hebrew, for instance, or even the non-mono version of the font).
https://typeof.net/Iosevka/