One of my favorite non-denominational, or maybe it's Evangelical, not sure what mega-churches are, people was my previous employer. He was raised Church of Christ by a very harsh Scottish descent father. He had a major collapse of faith for many years due to the spiritual abuse of both his family and Church of Christ.
Eventually he followed his wife to church at a mega-church where he could just sit in the back and not be noticed. It took years, but he finally healed somewhat from spiritual abuse. He had very funny stories about his childhood experiences in church, but of course when he was young it wasn't so funny. They sounded like people who try to read the Bible as an instruction manual on how to conduct church services, but that isn't the intention of the New Testament. It's like reading the Electrical Code to try to know electrical installation mechanics. It just doesn't work that way, it's a code book.
He's a genuinely good person who was very happy for me when I was baptized and didn't care that it was Orthodox.
The others are the people who are struggling to be good people, and they are different from average folks. By their fruits you will know them. Some of them I look in their eyes and I see the light of Christ. They love and they are humble. They try to help others. One lady started talking to me at work (different company though), she was so drawn to me, and asked me if I'm Russian. lol That was kind of strange, but she insisted that I seem Russian (she's Indonesian), but even Russians think I'm Russian at church. She insisted that I am a nice person and has even invited me to her house, which is basically unheard of in my weird and distinctly non-Christian work environment (we have a prayer room, but in the hyper-politically correct environment, it is only for Muslims, and people scream at each other and get very intense). I could tell the minute I looked at her she is Christian. Hardly anyone talks to me there except my direct co-workers, and it's usually just brief chit chat or work related. So it's very unusual and I'm grateful for her kindness and her everyday witness of Christ with her presence. There are other closet Christians there as well, we eventually find each other.
Another guy from work who was unfailingly kind to me and always helped when he could. Lapsed Southern Baptist. He said I never bothered him and I could come anytime, other people bother him, but I don't. lol I bothered him all the time with questions and he would attend to every one of them. That's unheard of in my job. But he doesn't like churches anymore.
The nurse at the hospital who tended to me when I staggered in from the parking lot and nearly passed out at the check in desk. She invited me to her church, and I figured they would help me, but I didn't go. I remember reading Elder Paisios saying that when the people won't help someone, God will help them. And He did. Even some Orthodox people thought I was crazy and they would constantly ask, "What are you going to do?" And I would say, "I don't know, I'm waiting on God." They would insist that I have to do something myself because God helps those who help themselves. Pretty sure that is Ben Franklin, not God. Except the Ethiopian lady at my parish. She accepted my answer no problem. And God did help me after I learned that I can do nothing alone, an important lesson in trust.
Another time I attended to an elderly couple at hospital. The woman was having surgery and her husband had Alzheimer's. I was there to sit with him, help him find the bathroom and the cafeteria and guide him back to the waiting area, and help her get back home afterward. While I sat with her in the surgery prep area like 5 different people came through, and each one told us about their religious beliefs. I don't know if this is typical for hospitals nowadays, but it was strange how everyone just felt inspired to share something. There were some very different takes on things. One asked if the woman would like a minister to come and pray before surgery, and the woman agreed. A young girl showed up in little red flats and said a prayer. She was a pastor! It seemed so bizarre to me and the prayer just sounded weird. I kept staring at her shoes and her little girl feet, I was so in shock. lol I guess I'm just set on the idea that priests are men and that's it. Another lady said I must come to her Russian church. Apparently the Russians have an Evangelical mega-church in the area. I was so confused by 'Russian church' I had to ask her what church, because Russian Orthodoxy is so small here. Most of the Russian emigrants are anything but Orthodox. Really nice lady though, and very excited about her church.
A long time ago I read a book by a 19th century Dutch Reformed pastor from Capetown, South Africa: Andrew Murray. I remember liking him.
When I was an Orthodox catechumen seems like I tried to revisit his work, but found things that I couldn't agree having been more exposed to Christianity. But he does have a lot of good things to say. http://www.ccel.org/m/murray
My favorite Orthodox person so far is the Ethiopian lady I stood behind during Liturgy. I always knew she was so special, but I didn't know why. When she passed, I learned that she had been in a Communist prison and tortured for about seven years. Her husband was assassinated, her many children scattered. She was very quiet and humble, but her face radiated deep love and peace. I think she is a saint. When that happens, just being in their presence is a help.