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

Moira currently leads with a 67.1% win rate and 6.3% pick rate on Oasis. Tracer and Kiriko round out the top 3.

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

S-tier on Oasis: Moira, Tracer, Kiriko, 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 2026-04-26 to 2026-04-26 (1-day rolling window).

Filter

Overwatch Grandmaster Tier List on Oasis (1-day)

Auto-generated Overwatch tier list on Oasis for Grandmaster players, derived from a 1-day window of competitive play. Win-rate and pick-rate weighted, refreshed daily.

Last updated Sun, 26 Apr 2026 18:48:16 GMT · data window 2026-04-26 → 2026-04-26

In Grandmaster competitive Overwatch on Oasis, the current S-tier picks are Moira, Tracer, Kiriko and Illari. Rankings combine win rate and pick rate over a 1-day window of ranked play, refreshed daily.

Rank

All Bronze Silver Gold Platinum Diamond Master Grandmaster

Role

All Tank Damage Support

Window

1 day 7 days 30 days

Moira67.1% WR · 6.3% PR

Tracer58.3% WR · 36.6% PR

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?: Moira currently leads with a 67.1% win rate and 6.3% pick rate on Oasis. Tracer and Kiriko round out the top 3.
Which heroes are S-tier heroes in Overwatch in Grandmaster on Oasis?: S-tier on Oasis: Moira, Tracer, Kiriko, 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 2026-04-26 to 2026-04-26 (1-day rolling window).

FREQUENTLY ASKED

RELATED TIER LISTS