TOS started out as the Kirk show. As Spock became popular he got more focus. Even when he was the focus Kirk played a big part (Amok Time. Journey To Babel...) We've had episodes that gave Saru and Tilly a lot do and development much in the way Spock was.
Picard rapidly became the lead in TNG, even though the original plan was for Riker to be more of an equal character.
DS9 was more of an ensemble, but Sisko was clearly the lead, the Bajoran messiah and savior of the Federation.
Voyager was the Janeway show
Still nothing compared to the treatment Burnham gets so far.