ADB: How to tap/close from recent apps to completelty through ADB one liner command

Finally, I got the answer when I tried combining multiple commands:

1. Open the app switcher

   adb shell input keyevent KEYCODE_APP_SWITCH
   

2. Select or navigate to the next app in the app switcher

   adb shell input keyevent 20
   ...
   

   (run the above command again for each app down the list)

3. Remove the app from open app list

   adb shell input keyevent DEL
   

And you are done :-) the app gone out of your open apps list.