Langrisser I (Warsong) is the only game with permadeaths.
Langrisser I MD and PCE have one ending I've never compared to see if they are actually different, but the credits for PCE do shown Ledin and Chris getting married and everyone in fancy wedding duds
SS/PSX/PC four endings in kill, deaths, with what Langrisser Knight said.
Langrisser II, Each character, except Erwin have nine endings in all, based on as Langrisser Knight said, wins, and if the deaths are 0, 1, or 2 and more I have a chinese post somewhere that gives kills counts and deaths. I'll dig it up later. It is not uninformed, Scott takes less kills than Hein for the best ending.
Erwin has two and I think it's based purely on Liana endings.
In Der characters generally gave four endings, for each character, paths dont affect hein much, just his intro paragraph. I cant remember about Erwin.
Again it follows what LK said. The DE edition does give more endings for those on the true light path. I know little else on this. Except Lana best case ending is kinda of nice
Langrisser 3 in think follows the same pattern. But I never tried to find out. With romance mixed in. And I suppose whether you go extended or not.
With IV and V it's no longer a kill count and defeated account, but instead activity account and defeated account. Generally four endings on each path, but romance also effect endings so that Landius and Sigma ending is low and high activity and then on which woman they wooed and didn't. The women partly reflecting this.
V has no paths. So generally four, with the women getting an extra snippet on who gets Sigma.
Note the romance effects the hero and really just add a little comment generally to the heroines.
It may affect one other character
I.e. does Landius end up with someone and conversely does Rickey depending on whom Landius doesnt end up with.
L3 is similar Dieharte has options, but if he doesnt go after one girl, Lewin can get her.
L5 only Sigma of the guys get someone. Alfred gets no love I guess and McLain has a certain sorceress.
Outside of a generally idea, I have never seen an official number to switch endings except for md, which I'll post up the link later when I decide to actually find it 😃
The games outside the main series also feature multiple endings
Millennium Dreamcast has good and bad endings at least for the main crew and the WS has an ending that is slightly different based on the chosen path.
Reincarnation each character has multiple endings and romance and path stuff us mixed in. And honestly I dont know much more than that. I've only played through it once (honestly cant remember if I actually finished finished it)
That in anycase is much longer than needed post to give a sense of endings.