I simply cannot name ONLY 5 so I'll name 5 categories
1 Reverbs: Glaceverb, Signaldust TilaVerb room emulator and Abstract Chamber are both amazing, Bootsie's EpicVerb
2 EQ: Sir Elliot makes some truly impressive stuff, a few faves are Narrow Q, 11, 18 and 31 band graphics and Paragrahpic EQ are ALL top notch stuff. DDMF makes the Color EQ parametric and a 10 band parametric that work great. J1000 plugs both the Mastering Mq57 and the channel Pq33 eqs are excellent. Bootsie's Baxter makes me smile every time. Sonimus SonEQ with those lovely filters and that smooooth top shelf.
3 Dynamics: Bootsie with the new Density III (just stupid good) and the thrillseeker both great comps. My absolute favorite deesser is the Spitfish, does what it does better than anyone else I've tried. Someone mentioned theTDR Feedback comp and Vladg's Molot and limiter 6 and I wholeheartedly agree with both those choices.
4 Delay: Once again were back on Bootsie turf with the Nasty DLA
5 Saturation: Bootsie's Ferric gets an immediate mention, as does SIRELLIOT with his preamps 1977, 1968 and RT-1 preamps. There's a bunch more but that'll get u going