Maitland Ward Pigeonholed Best -

The term "pigeonholed best" might mean the role that best fits her but also perhaps the one she's been typecast in. I need to make sure I'm not missing any key information. I should also consider if there's a common perception that she didn't get other roles because of one. Alternatively, maybe they're looking for a comparison between her roles to see which one is the best example of her being pigeonholed.