Gitlab and Concourse both support windows runners as far as I can see. They also don't require docker, but you might actually want that for most of your jobs.

My biggest gripe about gitlab is you can't schedule a job in code, and I suppose it's less then ideal to support 3rd party repos in hosted gitlab, but I don't know why you'd not use it as an SCM.

The bigger problem, would be using a group job that triggers a bunch of other jobs to do the many modules type of development you spoke about, but I'd just develop my modules seperatly, and build them in parallel steps if need be.