Newbie wanting advice

Good morning mfk members , after 4 years of successful fish keeping 100-150 litre tanks , last year I had shut them all down due to moving back into my parents house , a year later I now have my own place again and what way to celebrate ? A nice big tank 5 x 2 x 2 the biggest I've kept , and with that I want to keep the biggest fish I've kept so far and this is where I need advice I pick the tank up Thursday and I've built my 100litre sump ready and I have a 2500 lph pump with Alfa grog (50kg) in a pond waterfall ready to go and seeded

so stocking advice please this is what I want to keep but isit compatible and is my tank big enough to keep planned stock

synipulis
oscar
green terror
green Severum
electric blue jack Dempsey
Plec ( not picked type yet )
All fish to b kept as a single so all male all female ? Any advice will b taken on board



advice please