Of all the widely available SP maps, some from FH2SP mini mod, only few are stable in FH2.2:
Very stable, no crash experienced by me: Giarabub (NA), Sfakia (NA), Mesra Matruh (NA), Siege of Tobruk (NA), Bardia (NA/FH2SP), Fall of Tobruk (NA/FH2SP), and Tunis (NA)
Partially stable, sometimes crash, but you can mostly finish one-two rounds: El Alamein (NA), Alam Halfa (NA/FH2SP), Gazala (NA/FH2SP), Sidi Rezegh (NA/FH2SP), Crete (NA)
Unstable, will crash before one full round: Hyacinth (NA), Supercharge (NA), Aberdeen (NA)
That leaves only Mareth Line (NA) for North African and Mediterranean theater.
Bardia has issues with some neighboring Strategic points, but can be fixed easily in the editor. It is the best SP map for NA theater IMO. The second best is Fall of Tobruk, except the British bots don't use their M3A1 Honey tank. It is the most perfect urban combat map that combines armor + infantry. And then there is Giarabub for best alleyway fights and narrow streets fire exchange. The most boring would be Mesra Matruh and Siege of Tobruk, as it is a very strategical big map, the stupid bots makes the dessert warfare game slow-paced and silly... as they attack individually, have to blame it on the map layout and the AI.
Normandy maps are all fine, Pointe du Hoc, Purple Heart Lane. Luettich will sometimes crash, but you can play one-two or more rounds and generally playable. Only Goodwood that is unstable and will crash (never played one full round on it, even after omitting non-AI vehicles).
That leaves Lebisey, Totalize, and Falaise Pocket.
Every working map in Normandy is awesome. Unlike dessert warfare, which requires group attack to make things more fun, in Normandy, lonewolfing is pretty okay. The most fun would be Purple Heart Lane, thanks to its wonderful layout, with stupid bots, the game would feel scenario-like. The most boring (even though better than NA boring maps) is Pointe du Hoc. It is just a repetitive shootings with Germans coming from that particular positions from time to time. Actually, the map would be the best if the objectives of destroying 4 155 mm guns were also implemented in SP version (we have to do it alone, since bots don't understand it, anyway Call of Duty and Medal of Honor games are also the same, we have to do it all alone).