My opinion for what it’s worth. I’ve lived in the area for a long time and daughters have been through one of the above fairly recently
Bluecoat - big, lovely grounds. Strong in 11 plus for neighbouring King Eds but also in sport, music and drama
Hallfield - less rounded than Bluecoat. Strong 11 plus emphasis. Now offers to 16 so this may have shifted
Priory - all through, Catholic, expensive due to small class sizes. Not very academic
West House - prep only, small, all boys, good pastoral
EHS - all through, nice girls school, very good pastoral
Norfolk House - tiny, don’t hear much about it tbh
StGeorges - all through, good SEN provision and pastoral. Less academic.
Hope this helps!