My friend is has worked at a couple of the "Big 4" best consulting firms in the world, and those include: Deloitte Touche Tohmatsu (Deloitte), KPMG International (KPMG), PricewaterhouseCoopers (PwC), and Ernst & Young (EY).
She says out of them all, EY stands out for employee satisfaction and offers the best benefits.
Hope this helps :)
I agree with the other answers - i think if you look at the Big 4 audit/assurance firms EY/PWC/Deloitte & KPMG you cant go wrong. I personally trained with KPMG in Ireland and really liked it there. I also work closely with people from PWC and EY and they also seem like great firms too and will provide you with fantastic training and a wealth of experience with different types of clients. They will be quite similar in the way they operate - you can look up reviews online to see about specific benefits and their inclusivity scores.
Best of luck,