Anyone still playing Warframe?
As for melee weapons I prefer Fragor Prime and Galatine Prime. Especially when you face high level Infested, above rank 50 and/or going for a long run.
Me and a mate did an ODS and when we left after around 50 mins when our shields began to struggle, our weapons still tore through lvl 87 Infested like butter.
Other fun weapons is the Ack & Brunt, Destrel, Scindo Prime, War, Tipedo, Kesheg and many more.
Even Venk Prime is quite fun with the right stance mod.