send multiple models or parameters from controller to view?

First of all you need to understand the purpose of ViewBag variables, ViewBag transfers data from the controller to the view, ideally temporary data which in not included in a model(i.e page title or any other data which can be layout level or page level data).
Now if in your case you still want to stick with the current approach then having the intellisense is not a big deal, you can get the intellisense by casting your ViewBag variable to your model at the top of your view.
But the best approach would be to use the ViewModel,ViewModel is a class just like Model class but it contains some extra properties required only for business process(Specific to that view).
For example following new ViewModel can be created which can contain multiple models and parameters as per the requirement and pass it your view.This way you can access the feature of the model i.e(Validation through DataAnnotation,intellisense etc)

public class MyViewModel
{
   public List<ModelOne> ListOfMyModelOne {get;set;}
   public ModelTwo MyModelTwo {get;set;}
   public string MyModelListTiltle {get;set;}
}