She's also not on Slutskaya's level in terms of longevity, competitiveness and presence on the ice.
I did not like Slutskaya's skating so I am probably biased against her. Things I see Slutskaya lacking compared to Medvedeva and Zagitova though.
1. Medvedeva absolutely dominated 2.5 seasons. Zagitova has mostly dominated 2 seasons. Slutskaya was never dominant. There were periods in 2000, 2001, 2002, 2005, 2006, she might have been considered the favorite or the one to beat, even over Kwan, Cohen, Arakawa, whoever was her main competitor at the time, but she never truly dominated. Medvedeva and Zagitova have dominated.
2. Slutskaya actually could have won many more big events than she did. Which makes her a bit of a choker. She should have won 2 Olympics- 2002 and 2006, she wins both those with only a moderately good smooth 6 triple skate, which is far below her potential best, and she couldnt even manage that, big choking. She also missed chances to win 2000, 2001, and 1997 worlds. So many blown chances. Medvedeva and Zagitova have never missed an opportunity to win a big event, any chance they have they take it or atleast do their best to try and take it. Even the 2018 Olympics Medvedeva skated perfectly and lost, she did nothing to lose the chance like Slutskaya often does to herself. Imagine if Medvedeva had been lucky enough to be in the 2002 or 2006 Olympics instead and skated like 2018, she wins both those events super easily, as Slutskaya should have given the other performances but blew by messing up.
3. I dont think Slutskaya had any artistry. She was only a technical skater. Which is why whenever she missed any jumps like she often did in big events like Worlds and Olympics, like she missed crucial jumps in the 2002 and 2006 Olympics, and 2000 and 2001 worlds, she always lost, since she did not have the artistry to compensate for any technical errors. Now I know Medvedeva and Zagitova arent considered the most stunning artistic skater ever either, but I think they have some artistry and musicality, more than Slutskay atleast. They are both technicians and artists, which I dont think Slutskaya was.
Slutskaya is also lucky the Russian fed backed her over Butyrskaya. Had they chosen Butyrskaya as their favorite instead I bet Butyrskaya has atleast the same career Slutskaya had, if not better, and Slutskaya has no better a career than Butyrskaya had, if that. Anyone who followed skating at the time knows what I am talking about. The support between the two was never evenly split, even when both were contending. I have even heard at the 2000 worlds some of the Russian insiders were furious when the short program results were 1. Butyrskaya, 2. Slutskaya, 3. Kwan. They would rather have it end up as it did with Kwan winning but Slutskaya atleast being top Russian, than if they had gone 1-2 but with Butyrskaya winning over Slutskaya. And Butyrskaya was reigning World Champ at that point but the Russian fed was still 100% team Irina.
(To bomb once at the Olympics, Mr. Joubert, may be regarded as misfortune. To bomb four times looks like carelessness.)
but if we define "greatest" in terms of impact and performance ability rather than pure skill, I'd definitely favor Browning over Chan.
I don't think they're the best from Russia yet.P/B France? Think Anissina would have something to say about that 
