Shrub suggestion

Morning everyone, I was wondering if anyone could suggest a suitable plant for my friend. She wants to plant a shrub in a shady area (it gets sun only first thing and not really after 10am). She'd like flowers (and scent if possible as she has a bench there). I thought of rhodos but her soil is apparently not acid enough. I'm presuming the shrub would need an eventual height and spread of about 3 or 4 foot by 3 foot wide (ish). She put a philadelphus there two years ago but it won't flower (lack of sun?) and it's getting leggy (searching for light?).
Just wondered if anyone had any suggestions?
Many thanks.
Just wondered if anyone had any suggestions?
Many thanks.
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And thank you Borderline. The lady has just planted a Daphne Aureomarginate to the side of her bench so she might not want another daphne. So I may have to investigate my books and K67's link.