Kate Mulgrew and Jeri Ryan both seem higher end C-list to lower end B-list?
Both have worked solidly in the quarter of century since Voyager concluded (and just like Tom Cruise, Jeri Ryan still looks much younger than her real years).
From Wikipedia:
In popular usage outside the film industry, an A-list celebrity is any person with an admired or desirable social status. Even socialites with popular press coverage and elite associations have been termed as A-list celebrities. Similarly, less popular persons and current teen idols are referred to as B-list celebrities – and the ones with lesser fame as C-list ones. In 2000, Entertainment Weekly interpreted a C-list celebrity as "that guy, or sometimes that girl, the easy-to-remember but hard-to-name character actor".
Ask anyone on the street who is not a Star Trek fan (but has the potential to see a Star Trek film if it caters to the general public), in the 18 to 35 year demographic (which is what film producers cater to) who Jeri Ryan or Kate Mulgrew is, and I'd bet they would have never heard of those names.