I have worked with and without ECS systems both with and without good threading models. ECS writes do create possible issues if write-locks need to be acquired but that isn't usually so big of a deal.
I'm battling to understand what you want then, sorry. The systems that you say you would like to use (discrete jobs with dependencies) are the kind of systems the industry has been using since the advent of data-oriented architecture, which includes ECS. That is, a job worker process per core plucking off work and doing it.
In the engines I've dealt with, we don't usually have write locks, instead preferring copies of "last frame data" and "next frame data". And all our "read locks" are waits for jobs. Our game code is generally single threaded, but the main loop pretty much just kicks off and waits for jobs.
I guess what is a good threading model to you?
(As a side note I've worked on projects that use ECS on a single core and they still confer benefits there even though that's not what they were invented for)