not a subreddit but I cross-reference bogleheads wiki and /r/personalfinance wiki anytime I want to look for consensus or diverging opinion. Bogleheads still has a slight edge on /r/personalfinance for its specific topics.
Between Reddit and bogleheads, that is all the financial wisdom you need. Bogleheads has deeply shaped my investment approach and it should be the same for 95%+ of other people as well.
https://www.bogleheads.org/wiki/Main_Page