Newbie too

Hi my husband and I bought our 7 hectare block about a year ago and still feel really really green! I recently inherited a stallion miniature horse and I know nothing about horses! Hes been by himself in a paddock for a year and is a bit bitey and agressive but seems to be calming down. Does anyone know what paddock mate would be good for him? another minature but a gelding perhaps? would they fight?