The Triangle Shape is the closest waveform you’re going to get to a sine. You may need to increase levels, as compared to the harmonic-rich waves.
I’d start with only Shape 2, Shift 2, and Level 2. Zero out any Env, LFO, Detune, Spread influences. Drop Levels 1 & 3 down for now.
Attack, Resonance & Cutoff start at minimum, then purposefully raise the Cutoff value. With few harmonics, it will be up there. Once happy with the base tone, see if where the Resonance might add something special.
Now you can mirror those settings in Shape / Shift / Level 1 & 3. Use the other Shifts to add ‘harmonics’, if you want, and the 3 Levels as a sub-mixer. Probably Unison, 5ths & octaves.
If this sounds like a good enough ‘sine’ emulation at this point, you can start adding some motion to it. Env Amount & Sens for a snappy attack. You will probably have to reduce Cutoff now to compensate. Maybe a very slight wobble with Detune, or an LFO Pitch or PWM. Careful with the LFO amounts. A little goes a long way very quickly.
I suppose a text description isn’t the best approach, because many of these parameters are interactive. Back & forth with slight tweaks is going to dial it into the sweet spots.
