Try Rotosound 77series !
Yes, FLATS bright enough for slap absent is the zing of a round wound but they still "ping" especially if you lower the action and use heavy gauge ( think Steve Harris)
Thump and volume easy on the frets . Feels great for fretting / hand plucking fingers . Surprisingly detune fairly well in the higher gauges
You can fake the bright overtone wash of a round wound with a small dash of fast shallow chorus added mixed in really dry
These are a stiff string so a light touch player may like them looser. ( lighter gauge)
Myself low action on my Warwick ( 50-130 5 string) med to heavy touch ; pick and fingers, a little slap
Patsy cline to pantera is the musical range
Oh did I mention they last nearly forever and get better with age?