I’m so sorry to hear that your husband has been through so much loss in his life and that his anger his having such an impact on your marriage. I hope that it’s helped a little to share things here.
Anger can be a common part of grief, but it does sound as though this is quite extreme in your husband’s case. It’s not fair for him to blame this on you or your marriage, and you should not have to be subject to constant angry outbursts, even if his grief is at the root of them. It sounds as though he could really benefit from some professional support such as counselling, but, sadly, you can’t force him to seek support if he isn’t open to it.
Maybe if you are really clear with him that leaving is a possibility, it could be a wake up call to him that he needs support? You do have to consider your own well-being, and leaving is a valid option if he really won’t consider seeking any support for these issues.
As @Abdullah mentioned, I can try to point you in the direction of some relevant posts.
@Becky1982 has posted recently about her husband losing his dad: How can I help my husband after him loosing his dad?. You could consider replying there if you want to talk to her.
I’ve also found this post, which is much older, but does cover some of the issues you’ve raised: Grieving husband- anger issues - I don’t think the users involved have been active on the site for a long time, but it might be worth a read to see what other people’s experiences have been.