I nominate:
@gammarat - great recent write-up on genetic algorithms, has a lot of smart thoughts and ideas, would love to hear them more and more often
@nyuton - not highly active recently (maybe because there is still no incentive for high quality data science posts? 
), but I really liked older model ideas and project initiatives
@surajp - can’t nominate an elder, sorry, but since this comment has transformed into a shoutouts post: love following your work on transformers, would love to read more on that. Also, I have yet to look into your signals work but kudos on that too! 