Looks like you'll have some variety there between the lists. Looks good.
You can find Tyranid models on Vanguard.
The 15mm "Entomorphs" works great for all sorts of Tyranid proxies:
https://vanguardminiatures.co.uk/produc ... ntomorphs/And Onslaught has got infantry, and will be expanding its line soon.
https://vanguardminiatures.co.uk/produc ... es/legion/https://vanguardminiatures.co.uk/produc ... xenomites/Apart from the approved "Onachus" NetEA Tyranids, we're also working on Hive Fleet Gorgon and Hive Fleet Dagon. I'm AC for the last one, and it works a bit differently. E-UK also has their own take on the Tyranids which is very different as well.