For those serious about work: Jeff Nippard; for fitting training into daily life: Reiaki Yamazawa
Right now the people I recommend most to others are Jeff Nippard, and in Japan, Reiaki Yamazawa, I think. Jeff explains things logically with an evidence-based approach covering training, sleep, and frequency design, so it’s a perfect fit for “people who are serious about work but want to boost their performance.” Yamazawa has a good balance of a real, tough mindset and a relaxed character, which is exactly right for “people who want to make training fit into daily life.”