If you are looking for ruby red, I don't think you can beat Fabulous Frieda. I am on my iPad, can't post a photo. We have storms in the area, so my main computer is shut down. But if you look it up in the database, I am sure I have posted at least one photo of it. I posted one on the Porch Swing thread a couple days ago, taken with a new camera tht I have been playing with.
As I recall, Charles Johnston is a ruby red. Been about 20 years? since I have grown it, hard to remember.
One that may be harder to find, but is a lovely ruby red is Kissed Off. It is one I would keep if I could only keep 10.