there used to be a lovely small mid pink one called Dorothy Perkins but was prone to mildew. It may have been 'improved' so worth a look.

'Goldfinch' would be one of my choices. Medium-sized, egg-yolk yellow, but flowers only once.
'Purple Skyliner' has been with me for 3 years. Lovely magenta-ish colouring and repeat flowering. Still going on my arch at the moment.

Thank you for your suggestions.