I don't think Sevilla would be actually relegated. But it will be a very fierce fight. They just can’t seem to be winning any matches these days. They had to let many key players go in the previous season and their current situation is not looking very good. Their downfall started in the last season and now it is even worse.
I think if Sevilla just wins a match right now, we can call them safe from Relegation for now. They need to win every 3-4 matches to stay safe from the relegation zone. I don't think Almeria or Granada will be getting over them. Their fight will be with Cadiz and Celta Vigo. It just does not feel good to see a team with this history go down due to these financial situations.
Sevilla is more in the safe zone right now and from the look of things Almara won't make it out from that zone considering their current standing and how things have gone in recent times, indeed Cediz will put up a good fight against Sevilla if ever the path crosses each other but even at that I am sure just as you have already said Sevilla will eventually escape relegation this season.
This is not the first time such a narrow escape has happened for the club and I am happy that at least we expect to see some positive development for the club after this season.