Sounds like a nice set up. From the photos I would say you need much more natural decor - live, silk and plastic plants are very important for making fish feel safe and secure in an otherwise very unnatural environment. It makes a real difference to their behaviour and stress levels and is a must, IMO.
You say you cycled it - what method did you use and what are your readings for ammonia and nitrite? Also what is your pH and hardness? If it's an extreme one way or the other you have vastly fewer species that can adapt and may need to adjust your stock or look into natural ways of changing them.
The Lido 100 is only a 100 litres so while not a tiny tank, you are still significantly limited on the numbers and types of fish.
dwarf gourami - great looking fish, best in m/f pairs. Often have nasty bacteria diseases and are not very robust. MUST be quarantined before adding to tank.
sparkling gourami - very small, very shy. Best in pairs or trios. Will not appreciate the more active fish and may be picked on by other gouramis.
moonlight gourami - nice fish, may be picked on (or pick on) other gouramis. Only viable if your tank is at least 36" long, IMO. Your tank looks too boxy to give them the swimming space they need at an adult size of 5-6 inches.
neon tatra - gorgeous fish, a favourite of mine. Must be added to mature tanks that have been stable for several months. High mortality rate on new purchases and due to Neon Tetra Disease, should be quarantined before adding to tank. Must be kept in groups of 6 or more.
black tatra - Which kind is this? Many tetras are described as "black", such as black neons, black widows and black skirt tetras. As with all tetras, must be kept in groups of 6 or more.
silver tiped tetra - another tetra, so another group of 6 or more.
clown loach - these guys get to 12" and are totally unsuitable for small tanks like yours. Require a 6 foot tank and should be kept in groups of at least 3 or 4, preferably more. A cute alternative could be a dwarf chain loach which should also be kept in groups, ideally 6 or more. Very pretty, active fish.
and one siamese f/f female - lovely fish, good size. Could have a single female or a group of 5 or more. Can be very aggressive so should be added last and a back-up plan is needed. If you need to relocate to a seperate tank, go for a well planted 5 gallon. Could well find they fight with the gouramis.
What I would suggest is either one large group of tetras (pick a species, get 10-15 of them) or two smaller groups (two species, 6-8 per group). That then gives you space for some gouramis (again, I would only pick one species and go for a pair or small group). I wouldn't advise getting loads of male dwarfs, even if they are pretty. I would also avoid mixing species as they can be territorial. Sparkling gouramis are very pretty but rather small and might get lost in the tank. They may also spend a lot of time hiding. Perhaps a pair of dwarfs (1m, 1f) would be best as your tank is too boxy for some of the larger gouramis (IMO).
Then you could get a shoal of small loaches (dwarf chain loaches are my suggestion if you like clowns).
So:
8 neon tetra
8 silver tipped tetra
2 dwarf gourami
6-8 dwarf chain loach
After that, you'll still have some space for a few more tetras if you want but I wouldn't add a different species. We have found that fish prefer to have larger numbers of a few species rather than smaller numbers of loads of species. Their behaviour is massively improved - they are less stressed, more active, more confident. Much nicer looking tank than a few fish here and a few fish there.
If you fancy some more activity in the tank, try a large group of shrimp. You can get some very colourful species such as red cherry shrimp and due to their small size and small waste prouction, you can have loads. I'd suggest 15-20 to start off with, but a minimum of 6.
