Protestantism's Calvinist, Anabaptist and Evangelical wings all have good features. After Christianity had been turned into a corrupt monstrosity of the state, they rejected top-down, authoritarian rule. They gave access to the Bible back to common folks instead of keeping them enslaved to their emperors (like Orthodoxy) or proto-Globohomo (like Catholicism). The Lutherans and Anglicans were not significant enough breaks. They purified Christianity of much of its paganized, pompous ritual and mythology. EVROPA that wankers like to jerk off was great because of the achievements of primarily Germanic, Protestant Europe that made the modern world, and Greco-Roman pagans that created philosophy.
The Calvinists were often very ugly in their own day with extremism, but they laid the foundations for Northern Europe's spectacular takeoff and the makings of a decent modern world. The more Calvinist a country went, the more advanced it was and the more contributions to humanity - scientific - it made, as a rule. Swiss, Scots, New English, and Dutch were all high-functioning Calvinist countries. On the modern Far Right people dick suck the Pope because they dick suck any thug with a crown or robe because it baaaaaaaased whether or not it did any good for people. Calvinism eventually morphed, particularly in America, into Evangelicalism which became the core of the American Red State culture. It had its downsides, like the Israel obsession, but that wasn't always a part of it and won't always be.
The Anabaptists didn't have so much of a contribution, but I strongly believe that they are the most credible in terms of personal conduct. Their pacifism was retarded and hypocritical in the sense that they could only survive in a world where other people DON'T share their values - are willing to fight their battles for them - but there is still something deeply principled in their refusal to bend to the world. Their emphasis on kindness and asceticism within a family context offered everything good about Catholic/Orthodox monastic life but in a way that was actually healthy. They are probably one of the finest peoples on Earth.
I like Mormonism's beliefs about the afterlife, its creation stories, basically all of its notions about the soul and the world and its fate, but I dislike its central authority (for the same reason I dislike the other organized churches), its legalistic attitude towards certain things, and many very unfortunate features like it being totally at odds with archaeology and the racist doctrines they retconned out of it. Mormons themselves are incredibly remarkable people and their combination of frontier individualism with Yankee ingenuity and communitarianism make them arguably one of the most civilized people on Earth.
Islam is violent, cruel garbage. It was an improvement on the pagan societies it displaced but has no merit compared to Christianity, other than that I like its monotheism (Christianity is NOT monotheistic, whatever knots they tie themselves into to try to justify it).
I don't actually know a lot about Sikhs, but I admire them as another syncretic ethnoreligion that seems to mostly focus on defending itself. It too is monotheistic. In general, it comes across as a kinder Islam but inaccessible to outsiders and demanding in its rules.
Hinduism is pagan trash. It belongs in the Iron Age with Greco-Roman and Norse. It just happened to get lucky and survive, for some fucking reason.
Buddhism is god-tier in terms of "actually making sense" and having useful lessons, but is an incredibly depressing and pessimistic faith. In Asia it is every bit as mythological as Catholicism is.
Confucianism is great in its emphasis on education, ancestor worship, and civics. It's horrible in that it places TOO much emphasis on social stability to the point where every society that adopts it stagnates.
Judaism, like Sikhism, is just another ethnoreligion, and unlike Sikhism it historically went out of its way to keep to itself while also preaching the superiority of its followers. Its culture ended up spawning most of the subversion and Communism of the modern day, so while not the fault of the Jewish religion itself, there is still a clear connection there. I find the idea of a "Chosen People" chosen by blood vile. Its biggest practicioners seem to show the least respect out of any religion for their own religion, considering that their whole body of law is basically just attempts to scam God out of his own rules.
TIER LIST
Calvinism/Evangelicalism
Anabaptism
Buddhism
Orthodoxy
Mormonism
Lutheranism/Anglicanism (gay and boring)
Confucianism (remove the autistic fixation on keeping things the same and it soars to S-tier)
Sikhism
Hinduism (at least there's no fucking Hindu Pope)
Judaism
Catholicism
Islam (remove the Dark Ages shit and it jumps to the top)