Canary Ivy, over time, becomes very large and vigorous. It can develope large woody main stems and it twists itself in and around its supports. It may seem quite innocent for, say 2 or 3 years, after that it gets rather muscular, and it can get hard to sort it out. I would just admire it in a pot. I find it difficult to suggest 'easy ' climbers, as all ours have eventually meant hard labour to get them under control. Jasmine is another one that poses as a sweet innocent potplant, then, if allowed, gets rather frisky if planted out.

Will be 20 feet after 5 years, if that's any help. This one is also not reliably evergreen - may lose its leaves in a cold winter.