While we don’t see him on local stages quite as much as we used to — or we’d like to — Helm has given us an imposing set of performances in recent years. Nobody’s presence was more powerful so far this year than Helm’s in The Shakespeare Stealer. A double dose of splendor marked that exquisite production, where he played Widge’s fearsome master to launch the Elizabethan adventure. Then he changed costumes and temperaments to become Thomas Pope, a positively Falstaffian member of the Bard’s Globe Theatre and Widge’s most memorable mentor. Helm may be best remembered for his bravura performance of dozens of roles in Rep’s Fully Committed. We also thought highly of his Beatty in Fahrenheit 451 last year.