How to call same method on a list of gameobjects based on index/name

I am hoping to create a function that takes in an index and determine which function to call on a list of objects, something logically similar to

 delegate void MyDelegate();
 
 void CallMethodOnObjects(int index, GameObject[] objs) {
     MyDelegate del;
     switch (index) {
         case 0: {
             del = SomeMethod;
             break;
         }
         case 1: {...}
         default: {...}
     }
     foreach (GameObject obj in objs) {
         obj.GetComponent<SomeClass>().del();
     }
 }

I know you definitely cannot do this with delegate, so is there a possible walkaround for this situation (so that I do not need to check the index every time I operate on a single GameObject)

Edit: Since I am creating a bullet hell game, better performance is highly anticipated for this function.