Veneer on front root canal tooth: should I do two veneers or one or more? (photos)

Hi everyone, A long time ago I injured my front tooth and it died. I had root canal surgery 6+ years ago and after that procedure it slowly discoloured. My doctor recommended to go with whitening only since the tooth has great structure and the color isn’t too noticeable and to do veneers later However, I would like to do veneers now because the color difference has been a confidence breaker of mine. Should I do two veneers or one or more?