I know people from all denominations who love Christ. For several years I was a member of a Presbyterian congregation. I found it pretty colorless and bland, but when I prayed about it I kept getting a different answer than the one I wanted to hear. God kept telling me that I needed to be at that Church at that time and that I needed to bring myself fully to Him through service at that Church. I began teaching a Sunday school class, and the experience deepened my relationship with Christ. I was forced to read and study more scripture than I'd ever had before, and when I finally left that Church it was on God's schedule, not on mine.
Luke 9:49-50 tell us this:
John answered and said, "Master, we saw someone casting out demons in Your name; and we tried to prevent him because he does not follow along with us."
But Jesus said to him, "Do not hinder him; for he who is not against you is for you."
Ultimately, it is not denominations that bring people salvation. That task belongs to Christ. In the final analysis I'll let God sort this all out on Judgment Day.