Bambina versus Galan would be fun as well.
Escanor versus Shunsui would be fairly interesting I believe.
The way I see it, either:
-Shunsui plays Irooni and Escanor is most likely fucked since his intelligence feat is...so-so. So far he's normal in that regard.
-Shunsui uses other games which still boils down to physical fighting and Escanor dwarfs him. Unless Escanor is weak in the heart and Shunsui stabs the shadow there.
If somehow Shunsui can push it to Bankai then cool. But Escanor is not a Bleach character so certain reiatsu rules would not apply to him and Shunsui's bankai's Plays are not explained very well except for the first. Well, they are explained, but Lille's durability is pretty much questionable and we don't know how bad that sickness of the 2nd Play is.