if we talk about top teams in the last 5 years top1 is clearly Real, followed by Bayern and Barca, our 2 finals count little when measured up against the dominating style in which each of these teams cruised to a CL title in those 5 years, we probably come in 4th with our league dominance
if we talk about top teams right now, as in potential CL winners next season, I'd say Real>Bayern>=Juve>Barca. Whether Barca keep Neymar or not, much more important elements to their team like Iniesta and Mascherano are going downhill fast, also their goalkeeper is a disaster. Bayern are declining as well, but when I think who could challenge Real next year, they are the team that comes to my mind not Juve, so I put them slightly above us