I'm seeking recommendations on any 3rd party/open source Web UI Controls that provide features but do not interfere with the good work done in this template.
I have tried Telerik
<PackageReference Include="Telerik.UI.for.AspNet.Core" Version="2018.1.117" />
but that seems to interfere with the styling/behaviour of the other non-telerik controls. i even commented out all telerik styling etc but it's just so intrusive.
Anyway any thoughts would be appreciated
you can try DevExpress controls. It's pretty new and good. And bootstrap compliant... see https://demos.devexpress.com/aspnetcore-bootstrap/