The name of the second man is Oblt Rolf Tappen (without r) according to both Volksbund and death card (
https://www.fold3.com/image/699421178). Grave is Block 34 Grab 184 in La Cambe German War Cemetery.
Two death cards exist for Konrad Graf von Uexkuell-Gyllenbrand:
https://www.fold3.com/image/699210359 gives "Ceresy, bei Flers" as the death place
https://www.fold3.com/image/699710229 says "Mont Cerisi"
My guess is that the crash place was "le mont de Cerisy" (Cerisy mountain), near Cerisy-Belle-Etoile, some km NW of Flers. At 264m, it is the highest point in the area. In all case "Cerisi-Belle-Etoile" is the name of the village in the crash area, not a flight from Cerisi to Belle-Etoile.
http://www.maplandia.com/france/bass...-belle-etoile/
https://www.normandie-tourisme.fr/ac...ont-de-cerisy/
This man is also in the Volksbund database, written like that Oberstleutnant Konrad Graf von Üxküll-Gyllenband. Death place given as Mont-Cevisi (sic). Grave at La Cambe, Block 34, Grab 182 (right next to Tappen).