I'd say most of them tbh, mainly Matthew, Chris, Marlon and Ashleigh.
I'd say Pauline definitely lived up to her VT (I don't know why people say she hasn't she was a bitch in her VT and said she's not a very predictable person who doesn't suffer fools gladly). Toya has lived up to her VT as well, and Danielle has too. All the others are either a bit meh or are being something they're not.
Also Helen is the complete opposite of her VT. She seemed really sweet and didn't come across as a bitch at all on Launch Nights, but I prefer the Helen we're seeing now