Someone who is both a Do gooder and a Goody Two-shoes at the same time.
So someone who always likes to appear like they're helping someone while also working hard to maintain a whiter-than-white morally superior image.
It's getting so tedious with Helen. Every time I speak to her she manages to allude to how earnest and woke she is. There’s always some virtue signalling in there and some humble brags or other comments that hint at what a good, moral and worthy person she is. She’s such a Do Gooder Two-shoes.