Actually, if you saw the entire list of the Bellona (SGN104 sculpt) family tree and all the ships in it, it'd curl your hair. Starting with French L'Invincible of 1744, ending with the 1810s Russian Triokh Sviatiteleis--fifty years of iteration, up-scaling and down-scaling of the same basic design.

The two easiest adds for Swiftsure are L'Invincible herself, which was a Large 74 as opposed to SGN104's "Common" (24# vs 18# UD battery), and Culloden-class Annibal (ex-HMS Hannibal).