Aww, sorry to hear that sad news.
Did you get your filter working again? If not, that must be your top priority. Depending on what type of filter it is, I know that with one of mine it can be a bit temperamental and needs a little bit of a shake to get the fan inside going again.
Please don't be tempted to put another silver shark in your tank, though - honestly, it's only going to add to your troubles.
Are all your fry in that same tank with the other fish or did you put them in a fry tank? If they are all together in the one tank then most probably majority of them will get eaten off by the bigger fish - but then again, if they all survived what would you do with them all LOL
I wouldn't think about adding more fish to your tank just yet. See if you can get your tank stabilised first and once you can see that all fish are surviving and healthy, say in a few weeks time, come back on here, tell us what fish are remaining and we'll see what room you have left for other fish to be added.
If you were to rehome those larger fish (you will eventually have to give some away, as you know already) you would have loads of options for a really nice community tank - you could go for a peaceful set-up or semi-aggressive - depends what you like really.
If you want some examples - I have 3 community tanks. The largest tank is semi-aggressive, has a mated pair of pink short-bodied Convicts (Cichlids - very pretty, angelic-looking fish but not to be messed with!) and a rainbow shark of 5" (these don't grow as big as your silver sharks), the next tank is a peaceful set up - four guppies, two dalmation sailfin mollies, a pair of German Blue Rams (gorgeous fish from Cichlid family but they stay small), a Dwarf Gourami and two African Dwarf Frogs. The last tank at the moment is peaceful but could change in time as the Red Tail Black Shark grows (at the moment he's very peaceful and about 4") - he's in there with a pair of Platies, a sailfin molly, a female Betta, 3 Harlequins and quite a few platy fry. I thought the fry would have been eaten off but luckily majority of them survived - so when they are big enough they will be going to my LFS.
Anyway, those are just some ideas for you. Best thing is to get your tank up to a properly cycled level with the fish you already have, then you can decide (with Daddy's backing, of course!) what route you want to go down with the tank stocking. Ultimately, it will be your Dad having the final say on the matter 'cos he is the head of the house LOL - but as you get older you will begin to have more of a say in things and if you show Dad respect from now you'll have better communication and he'll be more inclined to let you run the tank how you want it.
All the best - Athena
ps - TBH = to be honest