1- Tether: USD
2- USD Coin: USDC
3- Binance USD: BUSD
These stablecoins seem very credible to me. And I use them constantly. Especially BUSD & USDT I mostly use for trading purpose and other work. And Coinmarketcap and other trucking sites price truck as rate of USDT. On the other hand USDT is very popular in p2p trading and most people use USDT for P2P.
I don't bother to know which stable coin is trusted and legitimate, however I have been a user of USDT for a very long time without any issue being the most stable coin which I used in Binance P2P transactions and I also used it to trade crypto/USDT pairs, I am sure other stable coins are reliable and trusted too, but my preference for USDT is second to none because I am used to hodling my coins with it, I believe every crypto users have their choice and preference for each of the stable coins mentioned by the OP