He asked me what else he could do to help me...
He can be someone interesting and fun to be around. He can demonstrate his knowledge of your love languages. He can suffer in silence and quit playing the victim, at least to you. He can continue his work on his childhood issues and bottled up angers and demonstrate sustained change.
He can work at being someone you can rely on to do the right thing. Not just no longer having an A, but doing more than his share of housework, bill paying, yard work, repairs, etc. without any prompting or asking from you.
Money is a common theme in your posts. He can sacrifice some to make more money from the household pot available for you. He could take an additional part time job, especially through the holidays to bring in additional money.
He can take, and demonstrate, responsibility for repairing himself, the marriage, and supporting you in your healing.