Its admittedly a small sample size but in 100 minutes away from all of McDavid, Draisaitl and Ekholm here are his numbers:
CF% 59.20 SF% 65.93 GF% 57.14 xGF% 65.15 SCF% 60.76 HDCF% 64.71 OZFO% 50%
With Ekholm away from the other two in just under 300 minutes:
CF% 56.32 SF% 56.32 GF% 53.57 xGF% 51.70 SCF% 53.91 HDCF% 53.21 OZFO% 47.22%
Now there is always additional context needed in terms of who was on the ice for the opposition at various times. But the reality is that in pretty much every situation the Oilers as a team do better both offensively and defensively when Bouchard is on the ice.