In Football if you are planning on 1 book and 1 book only, then Pinnacle is your choice hands down.
If looking for more than one, then Olympic and Cris for earliest #'s.
Or Skybook for free half point on sides or maybe 5 Dimes for props.
Most other books qualify as books that should be complimentary books to look for better numbers, free half point deals, reduced vig, etc.