I do chuck roasts all the time. I do various BBQ seasonings and I also have a Mexican style rub I use occasionally to and make Mexican shredded beef for tacos, quesadillas, nachos, etc. I don't use the pan method, I just smoke at 250-275, wrap in butcher paper when the bark gets where I want it or in foil for the Mexican beef to soften it back up a bit and cook to 207-208 IT. After a rest, it shreds decent, not fall apart like the pan method though. If you go whole time unwrapped, they get usually get quite a crust.
I have 4-5 chuck roasts and pork butts in the freezer, if the meat counters stay empty, we'll be eating lots of pulled cow and pig over the next couple months.