Who is the best hero in Overwatch on Oasis for Grandmaster players?

Reaper currently leads with a 54.3% win rate and 11.3% pick rate on Oasis. Tracer and Mauga round out the top 3.

Which heroes are S-tier heroes in Overwatch in Grandmaster on Oasis?

S-tier on Oasis: Reaper, Tracer, Mauga, Illari.

How is this Overwatch tier list calculated?

Heroes are scored from a weighted blend of win rate (70%) and pick rate (30%) across competitive matches in Grandmaster ranks, with a minimum pick rate of 0.5% to filter out off-meta noise. S/A/B/C/D cutoffs are percentile-based across the resulting score distribution.

How often is the tier list updated?

Daily. The current snapshot covers competitive matches from 2026-06-02 to 2026-06-08 (7-day rolling window).

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Overwatch Grandmaster Tier List on Oasis (7-day)

Auto-generated Overwatch tier list on Oasis for Grandmaster players, derived from a 7-day window of competitive play. Win-rate and pick-rate weighted, refreshed daily.

Last updated Mon, 08 Jun 2026 15:49:43 GMT · data window 2026-06-02 → 2026-06-08

In Grandmaster competitive Overwatch on Oasis, the current S-tier picks are Reaper, Tracer, Mauga and Illari. Rankings combine win rate and pick rate over a 7-day window of ranked play, refreshed daily.

Map

Reaper54.3% WR · 11.3% PR · 5.5% BR

Tracer52.4% WR · 22.1% PR · 8.8% BR

Mauga53.9% WR · 10.1% PR · 10.0% BR

Illari53.1% WR · 10.7% PR · 4.0% BR

Symmetra53.7% WR · 2.5% PR · 0.5% BR

Ashe52.5% WR · 11.7% PR · 0.5% BR

Brigitte52.6% WR · 11.0% PR · 1.1% BR

Hazard52.7% WR · 7.6% PR · 4.8% BR

Baptiste52.1% WR · 11.7% PR · 1.5% BR

Wuyang52.4% WR · 8.9% PR · 0.1% BR

Soldier: 7651.2% WR · 16.6% PR · 1.0% BR

Cassidy49.4% WR · 30.0% PR · 5.1% BR

Mercy50.5% WR · 20.2% PR · 3.0% BR

Juno51.5% WR · 12.4% PR · 0.0% BR

Pharah52.3% WR · 4.2% PR · 3.6% BR

Echo52.1% WR · 5.8% PR · 0.2% BR

Domina51.9% WR · 4.9% PR · 0.2% BR

Kiriko48.4% WR · 32.6% PR · 1.9% BR

Lúcio51.3% WR · 7.8% PR · 1.2% BR

Winston51.4% WR · 6.7% PR · 0.4% BR

Zenyatta51.1% WR · 8.8% PR · 0.4% BR

Orisa51.1% WR · 8.6% PR · 4.8% BR

Ana47.2% WR · 39.6% PR · 3.7% BR

Anran51.2% WR · 6.7% PR · 0.1% BR

Junker Queen51.5% WR · 3.8% PR · 0.0% BR

D.Va51.0% WR · 7.5% PR · 18.7% BR

Lifeweaver50.6% WR · 10.7% PR · 0.1% BR

Junkrat51.1% WR · 4.7% PR · 0.2% BR

Torbjörn51.2% WR · 2.9% PR · 0.0% BR

Genji49.6% WR · 15.2% PR · 0.2% BR

Sigma50.6% WR · 6.1% PR · 1.8% BR

Mizuki49.6% WR · 11.2% PR · 0.8% BR

Reinhardt49.6% WR · 7.5% PR · 0.1% BR

Bastion49.6% WR · 6.3% PR · 2.5% BR

Jetpack-Cat49.1% WR · 8.4% PR · 6.7% BR

Venture49.7% WR · 2.4% PR · 0.1% BR

Mei49.5% WR · 3.5% PR · 0.0% BR

Doomfist48.2% WR · 13.1% PR · 1.6% BR

Sierra48.7% WR · 8.9% PR · 0.3% BR

Roadhog48.5% WR · 9.1% PR · 1.5% BR

Hanzo48.7% WR · 5.5% PR · 0.1% BR

Moira48.5% WR · 6.1% PR · 0.0% BR

Emre47.5% WR · 9.9% PR · 1.1% BR

Ramattra48.2% WR · 3.4% PR · 0.2% BR

Wrecking Ball47.7% WR · 6.4% PR · 1.4% BR

Sombra47.6% WR · 5.2% PR · 3.3% BR

Widowmaker46.8% WR · 6.9% PR · 0.6% BR

Sojourn46.3% WR · 11.1% PR · 0.3% BR

Vendetta46.7% WR · 2.3% PR · 0.1% BR

Zarya46.1% WR · 5.3% PR · 3.7% BR

Freja46.2% WR · 4.4% PR · 0.5% BR

How tiers are computed

Pick-rate-weighted win rate and average pick rate are z-scored within this slice. Composite score = 0.7 * z(win_rate) + 0.3 * z(pick_rate). Heroes are sorted by score and bucketed by score percentile.

Pick-rate floor: heroes below 0.5% pick rate in the slice are excluded.
Score weights: 0.7 × z(win rate) + 0.3 × z(pick rate).
Tier cutoffs (by score percentile, of 51 eligible heroes): S = top 8% · A = top 17% · B = top 25% · C = top 25% · D = top 25%.

FREQUENTLY ASKED

Who is the best hero in Overwatch on Oasis for Grandmaster players?: Reaper currently leads with a 54.3% win rate and 11.3% pick rate on Oasis. Tracer and Mauga round out the top 3.
Which heroes are S-tier heroes in Overwatch in Grandmaster on Oasis?: S-tier on Oasis: Reaper, Tracer, Mauga, Illari.
How is this Overwatch tier list calculated?: Heroes are scored from a weighted blend of win rate (70%) and pick rate (30%) across competitive matches in Grandmaster ranks, with a minimum pick rate of 0.5% to filter out off-meta noise. S/A/B/C/D cutoffs are percentile-based across the resulting score distribution.
How often is the tier list updated?: Daily. The current snapshot covers competitive matches from 2026-06-02 to 2026-06-08 (7-day rolling window).

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