I'll take a stab at this.
Drier straight meads and lightly spiced metheglins match up well with fish, shellfish (lobster, crabs, shrimps) and fowl, pork, and some of the lighter game birds and small game (quail, partridge, pheasant, rabbit, turkey)
Medium sweet meads, metheglin, sparkling meads tend to go well with stronger fish (salmon, tuna, seabass) scampi (prawns), squid, goose, duck, goat, grilled vegetables, smoked meats, hams, etc.
Big, dry, strong melomels and pyments tend to match up more toward beef, lamb, marinara sauce, barbeque, etc.
Those are just my personal opinions, and there are a lot more matches with foods of all kinds and mead.
I love a good spicey metheglin with a honey glazed ham, and a good sweet mead with cheese, fruit and fresh baked bread. A nice hot mulled mead with some dried fruits and meats is always a good match up in my book too.
Hope that makes sense,
Oskaar