yes it is good to take courses from multiple different instructors so that you'll get more perspective. I had my OW with one instructor and the Nitrox with other and doing AOW and Deep with the third. will someday later take technical diving courses from two other instructors and maybe doing Fundies before that with the sixth instructorIt would be nice to just try a different shop other than what I used for my OW one too.
one does not even need take the courses from the same agency unless wanting to get some higher certifications which mandate having the lower cert levels finished. As long as you are continually learning and advancing it works fine to mix and match stuff