Good impact, or bad impact?
I think Guyton , if he starts at LT, has the potential to have the greatest impact, positive or negative. As a first round pick, he will get the best chance of playing significant time for the Cowboys in 2024. Beebe will probably start at C too.
I don't think the other draft picks will get that much playing time. Kneeland will split time with Sam Williams, but rookie DL usually do not make a big impact. Beebe will start at C, but learning a new position and getting his feet wet will probably make him less noticeable than Guyton.
I don't think Liufau will get much playing time but I could be surprised. If there is a dark horse to make the biggest impact, it might be Liufau.
Out of the rest of their picks, the only other guy I think could get some playing time is Justin Rogers. He could get on the field just because they Cowboys don't have much depth at DT.