This is such a difficult one, OP. It's not possible to make somebody want a child. Or to guilt / shame them into it. DH would like another, but for me it's no way José. (We have 3)
Everybody has different levels of patience, emotional resources, standard of living and free time that they feel willing to give up. For some people the desire for a / another child is the factor that counts the most for them, and none of those other things matter as much. But there aren't any rights or wrongs in the area of how many children somebody has in mind having - the heart wants what the heart wants. 🤷🏼♀️
If you want your OH to be a loving, committed dad, who pulls his weight, and a loving, committed partner who doesn't resent you, you're going to need to make sure he is genuinely, 100% on board with having another child.
Resentment is such a corrosive thing to a relationship- and at the moment it sounds like you have a tricky win/lose impasse to navigate either way.
It might seem an attractive option to say 'Oh go on, pleeease! if we have another baby I'll do the bulk of the parenting', but where that's happened I've never known it end well. And it goes without saying a kid surely deserves to be wanted by both parents.
If neither of you will budge, how high are the stakes? Is it something you would leave over?