Zepherine and her daughter Kathleen Harrup, certainly, but another and
more neglected thornless climber is Amadis, which does repeat a bit and
is a magnificent rich purple - stems are red at first, which is lovely
in spring (like peony leaves). Golden Showers has few thorns.

By contrast, New Dawn and her family are LETHAL and I never do anything
to mine without spiking myself.

--
Jane Lumley