Spawn enemies so they aren't spawned on top of each other (C#)

Hello my fellow great Unites, I have an enemy spawn system that spawns out enemies using Ienumerator inside a set of borders. Now the only problem is that the enemies will sometimes spawn out on the player, or another object..

How can I fix this problem? Using a for loop?

Here's the code:

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class EnemySpawn : MonoBehaviour 
 {
     // EnemyPrefabs
     public GameObject EnemyBouncingPrefab;
     public GameObject EnemyGrowerPrefab;
     public GameObject EnemyMinePrefab;
 
     //Show where spawn is prefab
     public GameObject showEnemySpawn;
     public GameObject showEnemyFlyBySpawn;
     public GameObject showEnemyGrowerSpawn;
     public GameObject showEnemyMineSpawn;
 
 
     // Array of spawn points 
     public Transform[] spawnPointsEnemyFollow; 
     public Transform[] spawnPointsEnemyExplode;
     public Transform[] spawnPointsEnemyFlyBy;
     
     // Borders
     public Transform borderTop;
     public Transform borderBottom;
     public Transform borderLeft;
     public Transform borderRight;
     
 
     //Used to put active enemies in a list
     public static List<GameObject> activeEnemies;
 
     void Start () 
     {
         // Starts a coroutine function for spawning bouncing enemies and fly by enemy
         StartCoroutine(SpawnBouncingEnemy());
         StartCoroutine(SpawnGrowerEnemy());
         StartCoroutine(SpawnEnemyFlyBy());
         StartCoroutine(SpawnMineEnemy());
     }
 
     void Awake()
     {
         // Create the list
         activeEnemies = new List<GameObject>();
 
     }
     
     // Spawn a Bouncing enemy
     IEnumerator SpawnBouncingEnemy() 
     {
         //Wait 3 to 5 seconds when game starts to spawn a ball
         yield return new WaitForSeconds(Random.Range(1, 3));
 
         while(true)
         {
             //Calls the function to set random position
             Vector2 spawnPoint = RandomPointWithinBorders();
             
             // Show spawn location for one second
             Object marker = Instantiate(showEnemySpawn, spawnPoint, Quaternion.identity);
             yield return new WaitForSeconds(1);
             Destroy(marker);
             
             // Spawn enemy
             GameObject newEnemy = (GameObject) Instantiate(EnemyBouncingPrefab, spawnPoint, Quaternion.identity);
 
             activeEnemies.Add(newEnemy);
 
             yield return new WaitForSeconds(Random.Range(4, 6));
 
         }
         
     }    
 
     // Spawn a Grower enemy
     IEnumerator SpawnGrowerEnemy() 
     {
         //Wait 3 to 5 seconds when game starts to spawn a "grower"
         yield return new WaitForSeconds(Random.Range(20, 40));
         
         while(true)
         {
             //Calls the function to set random position
             Vector2 spawnPoint = RandomPointWithinBorders();
             
             // Show spawn location for one second
             Object marker = Instantiate(showEnemyGrowerSpawn, spawnPoint, Quaternion.identity);
             yield return new WaitForSeconds(1);
             Destroy(marker);
             
             // Spawn enemy
             GameObject newEnemy = (GameObject) Instantiate(EnemyGrowerPrefab, spawnPoint, Quaternion.identity);
             
             activeEnemies.Add(newEnemy);
             
             yield return new WaitForSeconds(Random.Range(20, 50));
             
         }
         
     }
 
     // Spawn a Mine enemy
     IEnumerator SpawnMineEnemy() 
     {
         //Wait 40 to 60 seconds when game starts to spawn a "Mine_enemy"
         yield return new WaitForSeconds(Random.Range(45, 60));
         
         while(true)
         {
             //Calls the function to set random position
             Vector2 spawnPoint = RandomPointWithinBorders();
             
             // Show spawn location for one second
             Object marker = Instantiate(showEnemyMineSpawn, spawnPoint, Quaternion.identity);
             yield return new WaitForSeconds(2);
             Destroy(marker);
             
             // Spawn enemy
             GameObject newEnemy = (GameObject) Instantiate(EnemyMinePrefab, spawnPoint, Quaternion.identity);
             
             activeEnemies.Add(newEnemy);
             
             yield return new WaitForSeconds(Random.Range(50, 60));
             
         }
         
     }
 
     public Vector2 RandomPointWithinBorders()
     {
         //Code that will spawn a bouncing ball and ShowSpawn at a random position inside the borders 
         Vector2 random = new Vector2();
         random.x = (int)Random.Range(borderLeft.position.x, borderRight.position.x);
         random.y = (int)Random.Range(borderBottom.position.y, borderTop.position.y);
         return random;
     }
 }