Unfortunately his peak is really kind of short when compare with Cristiano. It was like comparing Ronaldinho to Messi, Ronaldinho may have higher peak in some people eyes (he has won both WC, CL and league titles, his dribbling, skills and flair was more eye-catching and entertaining), but career-wise it was no match at all.
Truth is Brazilian Ronaldo has had around 4 truly world class year (1996, 1997, 1998, 2002), Cristiano has had at least around 12 of those (from 2007 to 2018). That's huge difference. Brazilian Ronaldo has won Ballon D'or twice in his career (and 2nd place once), Ronaldo has won 5 times (and 2nd place 6 times). Thats country mile difference.
If you talking about peak only, right Brazilian Ronaldo at his short peak is breathtaking to watch, score a lot of goals, and some of his solo goals are amazing, but it just didn't last long. On the other hand, Cristiano Ronaldo at his peak is also amazing, maybe you lots have already forgotten how good he was when he was around 23 to 27, score all kind of goals, 50-60 goals per season is a just norm for many seasons, lots of tricks, great technique, electrifying pace, amazing long shots, non-stop running down the flanks, unstoppable in counter attack move too. He basically revolutionise and re-define the goalscoring wing forward role on his own, in similar fashion of Beckenbauer for the libero role, or Cruyff in total football role. (or Messi in goalscoring playmaker role)
Injury could have destroy the fat one, but same thing could be said of Bale(the new Ronaldo) or Jones(the new Edwards) too. But he still have a pretty good career, and reach short period of peak where very few in football history could have match (only Maradona peak is clearly better perhaps, others are at least comparable), but his career is just not close to GOAT one.