From the NYT,

“[With Navalny gone, other voices must rise],

Among them is Mikhail Khodorkovsky, a former oligarch who fell out with Mr. Putin, spent 10 years in prison and in London became one of his most prominent opponents in exile.

Then there is Maxim Katz, a YouTube influencer and a former poker champion, who is based in Israel.

There is also Ilya Yashin, a longtime liberal politician who is serving an eight-year sentence for publicizing Russian atrocities in Ukraine.”