Redact.dev worked well for me. Whatever you use, run it now before API cutoff, I have no idea what'll still work after that.
Reddit Migration
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As others have said, PDS is a good choice as it avoids a need to use the API. (It does depend on old dot reddit dot com however, but that's not going away tomorrow.)
Do keep this in mind however, https://kbin.social/m/RedditMigration/t/47320/PSA-If-you-have-more-than-1000-posts-more-than
In short you need to request and get the GDPR/CCPA archive from reddit to make sure you wipe everything. (Some folks can live with just wiping out their top posts and comments however, for which PDS is perfectly fine.)
The downside is that afaik there's no way to feed that archive to PDS. You'll need to use an API using script like shreddit to edit everything.
You can see what I did: https://kbin.social/m/RedditMigration/t/65260/PSA-Here-s-exactly-what-to-do-if-you-hit-the
If you do decide to put in a data retrieval request, there's a timeline tracker: https://kbin.social/m/RedditMigration/t/50981/Reddit-Data-Retrieval-Request-timeline-thread
power delete suite would fit your bill, but i'm not sure if it will work tomorrow
It should, it's just a script that goes though your comments after you've logged in and gone to your own profile. Shouldn't require API.
Edit: Psyche, it does use the API. But, it doesn't need to so hopefully they update it.