Task/UniTask-based Main Thread dispatcher classes, no GameObjects involved.

• Simple to use: call MainThreadTask.Run and that's it, your action will run on the Main Thread!
• async method MainThreadTask.RunAsync, so you can await for execution to complete
• TaskScheduler and TaskFactory used for running Tasks on the Main Thread are available
• UniTask-based implementation in MainThreadUniTask class, conditionally compiled if UniTask is detected in project
• System.Action extension methods InvokeOnMainThread and InvokeOnMainThreadAsync
• No GameObjects involved
• Simple implementations with around 50 lines of code each

Either:

• Install via Unity Package Manager using the following URL:

• Copy the implementation file Runtime/MainThreadTask.cs and/or Runtime/MainThreadUniTask.cs to your project.

  If using UniTask, either remove the #if/#endif lines from MainThreadUniTask.cs or define HAVE_UNITASK in your project's scripting define symbols.