Applying ED always helps, especially if you are full pay. The benefit has been diminishing in recent years, but it is still a sizable advantage. The last I remember ED admit rates are around 25% vs 10% for RD.
Regarding your question about boost as an unhooked candidate: your GPA/stats would place you at a ranking of 4/5 for Academics. A 5 is given to students in top 1-2%. There are similar ratings for ECs, standardized testing, reccs, etc. You are definitely within the range, but I wouldn’t say you’d be an auto-admit. Your case will likely be decided in the committee deliberations