OP is it your name and your choice - but yabu unreasonable to expect this not to affect him and to expect him not to be upset. You are proposing changing your name away from his - it is very different to not changing your name to be his.
I’d see this as a prelude to separation - because your comments aren’t making a lot of sense together. They probably line up perfectly in your mind - but for him probably not so much. Especially if there’s been tension in the marriage. And whether that is your intent or not, if your husband fears this is what this is about it will have that affect on him even if not for you.
A free things to think of around how these things look
As an outsider if you announced reverting to your maiden name I’d assume you had separated. I wouldn’t comment - but that would be my assumption. People around you and your husband will likely assume you have separated. That’s not fun for him.
You want to change your name to your father’s for the connection with him - so you don’t want that connection you currently have with your husband? That’s not an unreasonable conclusion. Or at least that the connection with your father is more important than maintaining that connection with your husband.
You want to change your name for the connection with your father - but are also proposing taking on some new random name the both of you. How can you expect him not to see this as you not wanting to have his name?
Honestly, making a major life change in your marriage just after you lost your father doesn’t seem sensible. This feels like a grief response, and one that may have unintended consequences.
Your husband is not being unreasonable for being hurt that you want to change your name away from his. It is ultimately your decision, but I would recommend that you think this through very carefully. Doing so will hurt your husband, and that shouldn’t be done lightly.