Games like League of Legends require complete focus and attention yet he somehow manages to regularly stream for 10 hours and sometimes reaches peaks of over 30 hours(!!!)[1]. Can you imagine solving leetcode problems (even easy ones) for 30 hours?
In 2020 he paused streaming so he could focus solely on going from Diamond (mid-to-high tier) to Challenger (highest tier). If I recall correctly, he said he would sleep on the couch by his computer, wake up, play and go back to sleep on the couch after ~17 hours.
I don't follow League of Legends (I prefer Dota) but tyler1 has always stood out to me as a person with an incomparable focus and dedication. I haven't seen anything similar in the Dota community and the only programmers that jump to mind would be geohotz or maybe Nick Winter[2].
[1] https://dotesports.com/news/tyler1-marathon-stream-top-lane-...
[2] https://blog.nickwinter.net/posts/the-120-hour-workweek-epic...