No, you are unfairly lumping Robert Schuller with the health and wealth heresy. Schuller was actually much more biblical than Osteen. Schuller had a relatively orthodox Christian basis for what he preached, but he had come from a theological background that destroyed any sort of healthy view of humanity. Schuller believed that the way to emphasize the image of God still present in humanity and to call people to something greater in Christ was to emphasize self-love. If we don't love ourselves, how can we love our neighbor as ourselves? However, Schuller went too far with it and distorted the message, losing the urgency of the gospel's call for transformation.
My only personal interaction with people from the Crystal Cathedral was in 1986 when my home church was going through a massive renewal (something I had not experienced before or since), where the Spirit was working through and in the people who gathered for worship at every service. We were seeing dozens come to faith every month without any special services or emphases. The pastor didn't even preach particularly evangelistic sermons, just a combination topical series or a series of sermons from a book of the Bible.
One Sunday evening, the youth choir from the Crystal Cathedral was on a tour and they sang at our church (one of the largest in the region) for the community. They did a fine polished job of singing, but it wasn't anything special. At the end of their program, our pastor thanked them for coming and gave an extremely brief appeal for all those who sense God calling them into a new life to come forward and speak to someone about faith in Jesus. The Crystal Cathedral choir began singing an invitation hymn, but they were struggling because so many were crying. Out of about 50 singers, a little more than a dozen stepped out of the choir loft and came forward to talk to our ministers. Almost every one of them made a profession of faith.
The scene reminded me of starving people suddenly finding themselves before a loaded banquet table. I had the distinct impression that they had heard all about Jesus, but had never been presented the opportunity to meet Him in a way they understood.