I know with Balls you can have "multi daddy" clutches, I've paired some of my female balls with 3-4 males this year. Have never done it with a corn, but would think it could be done. To be clear, the babies would have either one dad or the other. None of the babies would inherit genes from both males. Best you could hope for would be a mixed clutch with some from one dad and some from the other.
Bit of warning, corns can lay a LOT of eggs. I bred just 2 females last year and got 60 babies. Before you put your snakes together be sure you have a way lined up to sell the babies.
Do you know the background on your Bubblegum? I've heard the term used for extra pink snows, but also used for integrades of corns and another type of rat snake. If your female is an integrade it's very important you label all babies as such and not sell them as just "corns".
If you use only your Sunkissed Amel male then you would know all babies would be het Sunkissed. If you use both males, you would not know that for sure. As the other poster said, assuming the Bubblegum is Amel when paired with the Sunkissed Amel you would get all Amels, if the other male is not het for Amel then you'd know easily which babies came from which male, but if the other male is het Amel then it would really gum up the works as some of them would be het Sunkissed but some wouldn't and you wouldn't know which was which...
Can you post pics of the 3 corns in question?
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Slytherin Serpents
Have you been hugged by your snake today? 
Ball Pythons
1.1 Normals het Caramel (Edward & Bella)
0.1 Normal 66% ph Caramel (Rosalie)
0.1 Caramel (Bellatrix)
1.0 Honey Bee (Aragog)
0.1 Hypo Pastel (Nagini)
0.1 Spider 66% ph Hypo(Nymphadora)
1.1 Mojaves (Lucius & Renesme)
0.1 Pastel Lesser (Narcissa)
0.1 Pinstripe (Arwen)
1.0 Pewter (Salazar)
0.1 Bumble Bee (Alice)
0.1 Lemonblast (Luna)
1.0 Bell Pastel (Jasper)
0.1 African Dinker (Esme)
0.1 Normal (Madame Olympe Maxime)
0.1 Het Pied
0.2 Normal Babies 66% ph Caramel
1.1 Pastel "Dinker" Babies (Snape & Madame Hooch)
Corns
1.1 Normals het Amel, Anery, Charcoal, Diffused, Hypo (Romeo & Juliet)
0.1 Blizzard het Diffused (Tumnus)
1.0 Blizzards poss het Anery, Hypo, Diffused
0.1 Anery Lavender het Amel (Lucy)
0.1 Plasma poss het Hypo (Victoria)
1.0 Plasma poss het Albino
1.0 Hypo Plasma
0.1 Opal (Jewel)
0.1 Amel Motley
0.1 Diffused poss het Anery
0.1 Diffused poss het Anery, Albino, Charcoal, Hypo
0.1 Lavender Motley poss het diffused
1.0 Charcoal Ghost poss het Anery, Albino, Diffused
0.1 Charcoal poss het Albino, Anery, Diffused, Hypo
0.1 Fire poss het Anery, Charcoal, Hypo (LeeLoo)
0.1 Normal het Albino, Lavender, Anery, Charcoal, poss het Diffused
1.0 Albino het Lavender, Anery, Charcoal, poss het Diffused
Hog
1.0 Tri Color (Molly)
