The 4 in the first photo are Majanos, no doubt. The second photo looking to be ~6 aiptasia.
Nothing will work better than a peppermint shrimp for killing aiptasia, nothing. Any product that claims to be an aiptasia killer is some form of Joe's Juice, or kalkwasser. Joe's Juice will "kill" them, but in a few weeks they will return. A peppermint shrimp will eat the entire anenome, and it will not return. And, if by some rare chance it does, it will just get eaten again.
Big peppermint shrimp will be able to eat large aiptasia. If you can find a small peppermint, you can hit the anenome with some kalkwasser or joe's juice and it will shrink small enough for the small peppermint to eat it.
When it comes to Majanos, the only solution is a) don't touch them ever or b) remove the rock and cut the majano off. It's not difficult to take and scalpel and cut about 1/8" below into the rock to remove the anenome. It's a pain, but there are no other options at the moment. Majanos grow very slowly in low nutrient systems and most of the time only grow near each other, unlike the aiptasia that can spread through the tank. So Majanos are great to keep in refugiums for added biological filtration. (if you have one)