For me Colin + Anthony.

Anthony because he is the head of household and the last one to be happily married so I can totally see him giving advice in S3 to Ben like Daphne did for Anthony. It would be nice to see him and Violet stand up for Sophie + Ben like the badass Bridgertons

Colin. For multiple reasons…

1. His HEA is next and he NEEDS more screen time, growth, and need to win the audience’s heart after they butchered him up this season.
2. Book fans wants a good adaption and if they follow the book then it was Colin who told Ben to get his shit together. We were already robbed with the Colin/Kate dynamics so I will be pissed if we don’t get Sophie/Colin.
3. BCE are close in the series. They always have scenes together where they get along well so it would make sense to see Eloise and Colin (both together) being the two people who play a role in Ben’s love story