It depends on the kind of research you do, but one viable approach in some areas (which I've seen work in practice) is just to not have as many students. Plenty of tenured theory profs out there have one, maybe two PhD students at a time. They do still need to work with that student to send the student's papers to top venues so he/she can eventually get a job, but it's a lot less of a constraint than if it's a systems-style lab full of 5 or 10 PhD students who all need to be pumping out top-tier publications, and leaves considerable time to work on one's own projects with fewer constraints.