Do you have a Sous Vide machine? I think to get what you are wanting, that’s the way to go. I’ve cooked chuckie for 48 hours in a 145* water bath, then iced and then brought it back up to 145* on the Weber or 3D (have tried both ways). You get the best of both worlds here, tenderness, juicy and smoke.
If you don’t have one, I have an Anova sous vide, they are worth every penny! Another popular brand is Joule. Both are great. The Anova comes with a holder and joules just kind of stand in the pot/container.
But that’s an idea to get exactly what you might be looking for.