Welcome!
No, there is not "one" oil out there.
There are many choices for brands and grades, actually, that will suffice quite nicely.
You really haven't given us a deep understanding of what your engine specifics are (age, etc), severity of use and OCIs are, so we'll have to make some generalizations.
Depending upon application, you might be able to use a 10w-30 HDEO. Or, likely a 15w-40 will work well also. I mention this difference because if you have a lot of starts in winter, the lighter grade does very well. I have used 10w-30 and 15w-40 year round with equally good results.
You can use syn's if you choose, but know that there is little ROI on these unless you greatly extend the OCI.
If you intend to use UOAs to the full extent, you'll need to be consistent with the oil grade and brand. If not, then drain, fill and don't worry about it.
I fully expect that any CJ-4 fluid will fill all your needs; you can likely use one oil for all. If you're going to follow the OEM OCI guidelines, you'll be perfectly fine using any quality brand name oil (Delo, Delvac, Rotella, Tection Extra, Premium Blue, Long Life Gold, etc).
Follow your OEM specs and PM plan, and you'll get a long life out of your equipment.