For raids you don't really need a second move on much, none of the babies you mentioned would be worth it purely from raiding.
For PvP Togepi and Azurill would be your best bet. Azumarill benefits greatly in Great League with two moves and Togekiss would benefit from it as well. Keep in mind if you're able to catch weather-boosted Marill evolving a high-level one and buying a second move can save you more than getting the baby discount.