I have tried all of them.
right now, I would say WOLFPACK is hands down the most realistic: manual targeting, TDC, Hydrophone, rec manual, number of ships, diving and depth keeping modelling, systems modelling, wave and ocean modelling is miles ahead of other subsims.
re: SH5. I bought it when it came out and have played with most mods, but it was an aberration from the start. Ubisoft tried to create a subsim that would appeal to casual players and it never properly worked. Modders have managed to make it more palatable, but it is still simpler at all levels than WOLFPACK.
p.s. - I see you did not include SH4 in your poll. IMHO, it is the best of the SH series. It improved on SH3 and it was not dumbed down like SH5.
__________________
|