Hello Syed, it's hard to say which tool works best for you as you did not mention your application.
If you want to carry out fluid or thermal simulation, then it might be worth checking out SimScale. Its automatic mesher and default simulation controls have been specifically designed to be very robust, accurate and user-friendly. That way you can spend most of your time analysing results instead of optimizing your mesh, relaxation factors, Courant number, etc.
If you're looking at niche applications, then you can't go wrong with ANSYS, Siemens or Dassault as they cover areas currently missing in SimScale. If these three don't have your application, you can start looking at OpenFOAM (you might have to create your own solver in OpenFOAM :)