For club players
GM perelshteyn
1.Acc dragon,2.najdorf,3.scandi,4.lion,5.rat
IM kavutskyi
1.Dragon, 2.najdorf 3.Kan, 4.e5, 5.Caro
IM pruess
says Play all openings
GM Smirnov
Kan or scandi with 2.Nf6 but you should play e5 for a while to start.
#45
You have 2000, 2100, 2200, all the way to 2900.
For that reason I usually try to quote world champions.
"Show me three lines of the opening theory moves and
I will prove to you that two of them are incorrect." - Lasker