I've had excellent results with several amplifiers to drive a pair of Harbeth 30.1 35th Anniversary:
with the fast/articulate Swiss Goldmund Telos 280 (Class AB) *
with the richly textured American Pass Labs XA30.8 (Class A) *
with the charming vintage French Jadis DA 8 (PP 6550) *
with the precise yet delicate German T+A V10 (PP EL509/EC99/ECL82)
with the holographic and detailed Chinese Line Magnetic LM-845P (SET 845/300B/310A)
With the latest being my current favourite combo, but that can change regularly
* in the case of Power Amps they are mated with a Nagra Jazz Preamp (Class A 12AX7/12AT7) or an Ayon Stealth DAC/Preamp (6H30/6Z4).
Since you don't listen to hard rock/heavy metal, a nice tube amp can be a good option too!
Have you actually decided on an amp yet?
Best,
Joel