Mjolnir and Werewolf are probably the best SHFs in disco mod, everything else is meh.
Werewolf is probably the most newbie friendly there because it has decent turn rate while having those SHF stats.
Mjolnir is just a tankier(and slower) Werewolf but has 4 guns and 4 turrets, giving it more DPS.
But no one uses SHFs because they are big and slow, making them easy to hit (watch out for those snacs and mini-razors). Personally the Werewolf is the best because its decent turn-rate makes it more forgiving, and a nice powercore gives it all the tanky needs you require.
Spatial should never be considered as a serious ship. If the guy knows what they are doing, they will kill that Spatial and make it eat its own missiles/mines.