Happiest? I suppose that's why so many are on antidepressants or go on killing sprees because they snap under stress. Like hitting their children 160 times because of being too slow in finding something. Like killing (and eating) babies. And so on.
Most righteous? What about intentionally tampering with the Bible to issue death threats to anyone that doesn't join? Or, protecting pedophiles and silencing the victims, sometimes even creating these situations where none exist. Between recruiting from prisons and mental institutions, sexual repression, no opportunity to marry or properly date anyone with honor aside underage people, and even the occasional person trying to make children look more attractive to certain individuals (usually same sex), it's a wonder there aren't even more molested children. And, anyone that cuts off someone from the opposite sex and showcases same-sex children to that person ought to be hanged--if nothing else, for ruining lives.
Additionally, much of the pedophilia that happens is motivated by the desire to ruin the children's lives. Too many of the hounders and assistant hounders are mean-spirited, power hungry humanoids that live to ruin others' lives, and one way to do that is to molest children. They also make stupid rules (some of which are only in their local congregations). Of course, none of this is ever reported to authorities--and, in cases where they do not succeed in fully ruining lives, there may not even be evidence to support charges of attempted anything.
I also take issue with "righteous" when you have congregations that do exactly what they are preaching against. They preach against idolatry, and they worship their own leaders. They preach against polluting the earth, yet they generate more pollution per uint of value created than any other group on earth. They preach against Christmas because it's pagan, yet they do other pagan things. They preach against the UN, claiming they are Satan's organization; we all know about their involvement in the UN as recently as 2002. They tell parents not to watch violent movies, yet they make children read even worse violence in the publications. And so on. To me, this is far from being righteous.
Best dressed? You mean, the most out of date, tacky dressed? I have seen their suits, and looking back from outside I now think their dress is very tacky. If you are going to dress up, at least get some high-quality suits and dresses and use them judiciously. Dressing up all the time in crap suits is very tacky--I would rather dress in "casual business" attire that is appropriate for the conditions they are working in.
Most polite? I don't think going from door to door disrupting people's lives (and especially when this happens on major holidays or when people are obviously facing a major crisis) is very polite. Nor is hounding anyone that tries to leave because they don't believe the doctrine, they are being mistreated, or simply want time out because it's taking too much out of them.
Helpful? Only to their own, or those who they wish to make their own.
Purest? You mean, tampering with the Bible. There is nothing in the Bible that explicitly bans celebrating Jesus' birth, even if you don't know the exact date. Yet, the Washtowel Slaveholdery adds prohibitions where none exist, claiming that anything not expressly permitted in their interpretation of the Bible is forbidden. At the same time, I see nothing in the Bible that expressly permits wearing wedding rings. They do that anyways. There is also nothing in the Bible that requires people to all preach--even Paul explicitly said that only some would be able to do that, and that not all should be teachers. Yet, the Washtowel requires all to preach and teach.
I would rate the religion at minus.