Maybe 'The Unexpected Encounter'. It's a shorter fanfic but still manages to pack a punch. It starts with an interesting encounter between Phillip and the reader, and then it quickly builds on their connection. The writing style is easy to follow, and it gives a nice, light - hearted view of their relationship.
I would recommend 'A Glimpse of You' as a great starting point. It really captures Phillip Carlyle's charm and the relationship with the reader in a very sweet and innocent way.
One of the top ones could be 'Phillip's Promise'. This fanfic is well - written and delves deep into the emotions of both Phillip and the reader. It has a great plot that keeps you engaged from start to finish, and the characterizations are on point. It shows how their relationship might develop over time, with some really touching moments.